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%% This is part of OpTeX project, see http://petr.olsak.net/optex
\_codedecl \cite {Cite, Biblioraphy <2020-03-09>} % loaded in format
\_doc -----------------------------
Registers used by `\cite`, `\bib` macros are declared here
\_cod -----------------------------
\_newcount\_bibnum % the bibitem counter
\_newtoks\_bibmark % the bibmark used if \nonumcitations
\_newcount\_lastcitenum \_lastcitenum=0 % for \shortcitations
\_public \bibnum \bibmark ;
\_doc -----------------------------
`\cite [<label>,<label>,...,<label>]` manages <labes> using `\_citeA`
and prints prints `[<bib-marks>]` using `\_printsavedcites`.
`\nocite [<label>,<label>,...,<label>]` only manages <labels> but prints nothing.
`\rcite [<label>,<label>,...,<label>]` behaves like `\cite` but prints
<bib-marks> without brackets.
`\ecite [<label>]{<text>}` behaves like `\rcite [<label>]` but prints
<text> instead <bib-mark>. The <text> is hyperlinked like <bib-marks>
when `\cite` or `\rcite` is used.
The emptpty internal macro `\_savedcites` will include the <bib-marks> list to
be printed. This list is set by `\_citeA` inside group and it is used by
`\_printsavedcites` in the same group. Each `\cite`/`\rcite`/`\ecite` macro
starts from empty list of <bib-marks> because new group is opened.
\_cod -----------------------------
\_def\_cite[#1]{{\_citeA#1,,,[\_printsavedcites]}}
\_def\_nocite[#1]{{\_citeA#1,,,}}
\_def\_rcite[#1]{{\_citeA#1,,,\_printsavedcites}}
\_def\_ecite[#1]{\_bgroup\_citeA#1,,,\_ea\_eciteB\_savedcites;}
\_def\_eciteB#1,#2;#3{\_if?#1\_relax #3\_else \_ilink[cite:#1]{#3}\_fi\_egroup}
\_def\_savedcites{}
\_public \cite \nocite \rcite \ecite ;
\_doc -----------------------------
<bib-marks> may be numbers or a special text related to cited bib-entry.
It depends on `\nonumcitations` and on used bib-style. The mapping from
<label> to <bib-makr> is done when `\bib` or `\usebib` is processed.
These macros store the information to
`\_Xbib{<label>}{<number>}{<nonumber>}` where <number> and <nonumber> are
two variants of <bib-mark> (numbered or text-like). This information is
read from `.ref` file and it is saved to macros
\_bib:<label> and \_bibm:<number>. First one includes number and second
one includes <nonumber>. The `\_lastbibnum` macro includes last number of
bib-entry used in the document. A designer can use it to set apropriate
indentation when printing the list of all bib-entries.
\_cod -----------------------------
\_def\_Xbib#1#2#3{\_sdef{_bib:#1}{\_bibnn{#2}&}%
\_if^#3^\_else\_sdef{_bim:#2}{#3}\_fi\_def\_lastbibnum{#2}}
\_doc -----------------------------
`\_citeA <label>,` processes one label from list of labels given in the
parameter of `\cite`, `\nocite`, `\rcite` or `\ecite` macros. It adds the
<label> to global list `\_citelist` which will be used by `\usebib` (it
must to know what <labels> are used in the document in order to pick-up
only relevant bib-entries from the database. Because we want to save
space and not to save the same <label> to `\_citelist` twice, we
distinguish four cases:
\begitems
* <label> was not declared by `\_Xbib` and it is first such <label> in the
document: Then `\_bib:<label>` is undefined and we save label using
`\_addcitlist`, write warning on the terminal and define
`\_bib:<label>` as empty.
* <label> was not declared by `\_Xbib` but it was used previously in the
document: Then `\_bib:<label>` is empty and we do nothing (only data to
`\_savedcites` are saved).
* <label> was declared by `\_Xbib` and it is first such <label> in the
document: Then `\_bin:<label>` includes `\_bibnn{<number>}&` and we
test this case by `\if &\_bibnn{<number>}&` when `\_bibnn{<number>}`
expands to empty. The <label> is saved by `\_addcitelist` and
`\_bib:<label>` is re-defined directly as <number>.
* <label> was declared by `\_Xbib` and it was used previously in the
document. Then we do nothing (only data to `\_savedcites` are saved.
\enditems
The `\_citeA` macro runs repeatedly over whole list of <labels>.
\_cod -----------------------------
\_def\_citeA #1#2,{\_if#1,\_else
\_if *#1\_addcitelist{*}\_ea\_skiptorelax \_fi
\_ifcsname _bib:#1#2\_endcsname \_else
\_addcitelist{#1#2}%
\_opwarning{The cite [#1#2] unknown. Try to TeX me again}\_openref
\_addto\_savedcites{?,}\_def\_sortcitesA{}\_lastcitenum=0
\_ea\_gdef \_csname _bib:#1#2\_endcsname {}%
\_ea\_skiptorelax \_fi
\_ea\_ifx \_csname _bib:#1#2\_endcsname \_empty
\_addto\_savedcites{?,}\_def\_sortcitesA{}\_lastcitenum=0
\_ea\_skiptorelax \_fi
\_def\_bibnn##1{}%
\_if &\_csname _bib:#1#2\_endcsname
\_def\_bibnn##1##2{##1}%
\_addcitelist{#1#2}%
\_sxdef{_bib:#1#2}{\_csname _bib:#1#2\_endcsname}%
\_fi
\_edef\_savedcites{\_savedcites \_csname _bib:#1#2\_endcsname,}%
\_relax
\_ea\_citeA\_fi
}
\_def\_addcitelist#1{\_global\_addto\_citelist{\_citeI[#1]}}
\_def\_citelist{}
\_doc -----------------------------
The <bib-marks> (in numeric or text form) are saved in `\_savedcites`
macro separated by commas.
The `\_printsavedcites` prints them by normal order or sorted if
`\sortcitations` is specified or condensed if `\shordcitations` is
specified.
`\sortcitations` appends the dummy number 300000 and we suppose that normal
numbers of bib-entries are less than this constant.
This constant is removed after sorting algorithm.
The macros for <bib-marks> printing folows (sorry, without detail
documentation). They are documented in `opmac-d.pdf` (but only in Czech).
\_cod -----------------------------
\_def\_printsavedcites{\_sortcitesA
\_chardef\_tmpb=0 \_ea\_citeB\_savedcites,%
\_ifnum\_tmpb>0 \_printdashcite{\_the\_tmpb}\_fi
}
\_def\_sortcitesA{}
\_def\_sortcitations{%
\_def\_sortcitesA{\_edef\_savedcites{300000,\_ea}\_ea\_sortcitesB\_savedcites,%
\_def\_tmpa####1300000,{\_def\_savedcites{####1}}\_ea\_tmpa\_savedcites}%
}
\_def\_sortcitesB #1,{\_if $#1$%
\_else
\_mathchardef\_tmpa=#1
\_edef\_savedcites{\_ea}\_ea\_sortcitesC \_savedcites\_end
\_ea\_sortcitesB
\_fi
}
\_def\_sortcitesC#1,{\_ifnum\_tmpa<#1\_edef\_tmpa{\_the\_tmpa,#1}\_ea\_sortcitesD
\_else\_edef\_savedcites{\_savedcites#1,}\_ea\_sortcitesC\_fi}
\_def\_sortcitesD#1\_end{\_edef\_savedcites{\_savedcites\_tmpa,#1}}
\_def\_citeB#1,{\_if$#1$\_else
\_if?#1\_relax??%
\_else
\_ifnum\_lastcitenum=0 % only comma separated list
\_printcite{#1}%
\_else
\_ifx\_citesep\_empty % first cite item
\_lastcitenum=#1\_relax
\_printcite{#1}%
\_else % next cite item
\_advance\_lastcitenum by1
\_ifnum\_lastcitenum=#1\_relax % cosecutive cite item
\_mathchardef\_tmpb=\_lastcitenum
\_else % there is a gap between cite items
\_lastcitenum=#1\_relax
\_ifnum\_tmpb=0 % previous items were printed
\_printcite{#1}%
\_else
\_printdashcite{\_the\_tmpb}\_printcite{#1}\_chardef\_tmpb=0
\_fi\_fi\_fi\_fi\_fi
\_ea\_citeB\_fi
}
\_def\_shortcitations{\_lastcitenum=1 }
\_def\_printcite#1{\_citesep\_ilink[cite:#1]{\_citelinkA{#1}}\_def\_citesep{,\_hskip.2em\_relax}}
\_def\_printdashcite#1{\_ifmmode-\_else\_hbox{--}\_fi\_ilink[cite:#1]{\_citelinkA{#1}}}
\_def\_citesep{}
\_def\_nonumcitations{\_lastcitenum=0\_def\_sortcitesA{}\_def\_etalchar##1{$^{##1}$}%
\_def\_citelinkA##1{\_isdefined{_bim:##1}\_iftrue \_csname _bim:##1\_endcsname
\_else ##1\_opwarning{\_noexpand\_nonumcitations + empty bibmark. Maybe bad BibTeX style}\_fi}
}
\_def\_citelinkA{}
\_public \nonumcitations \sortcitations \shortcitations ;
\_doc -----------------------------
The `\bib [<label>] {<optional bib-mark>}` prints one bib-entry
without reading any database. The bib-enty follows after this command.
This command counts the used `\bib`s from one by `\bibnum` counter and
saves `\_Xbib{<label>}{\_the\_bibnum}{\_the\_bibmark}` into `.ref` file
immediately using `\_wbib`. This is the core of creation of mapping from
<labels> to <bib-marks>.
\_cod -----------------------------
\_def\_bib[#1]{\_def\_tmp{\_isnextchar={\_bibA[#1]}{\_bibmark={}\_bibB[#1]}}%
\_ea\_tmp\_romannumeral-`\.} % ignore optional space
\_def\_bibA[#1]=#2{\_bibmark={#2}\_bibB[#1]}
\_def\_bibB[#1]{\_par \_bibskip
\_advance\_bibnum by1
\_noindent \_def\_tmpb{#1}\_wbib{#1}{\_the\_bibnum}{\_the\_bibmark}%
\_printlabel{#1}%
\_printbib \_ignorespaces
}
\_def\_wbib#1#2#3{\_dest[cite:\_the\_bibnum]%
\_ifx\_wref\_wrefrelax\_else \_immediate\_wref\_Xbib{{#1}{#2}{#3}}\_fi}
\_public \bib ;
\_doc -----------------------------
The `\_printbib` prints the bib-entry itself. You can re-define it if you
want different design. The `\_pritbib` starts in horizontal mode after
`\noindent` and after the eventual hyperlink destination is inserted.
By default, the `\_printbib` sets the indentation
by `\hangindent` and prints numeric <bib-marks> by
`\llap{[\the\bibnum]}` If `\nonumcitations` then the `\_citelinkA` is not
empty and <bib-marks> (`\the\bibnum` nor `\the\bibmark`) are not printed.
The text of bib-entry follows. User can create this text manualy
using `\bib` command or it is generated automaticaly from a `.bib` database
by `\usebib` command.
The vertical space between bib-entries is controlled by `\_bibskip` macro.
\_cod -----------------------------
\_def \_printbib {\_hangindent=\_iindent
\_ifx\_citelinkA\_empty \_hskip\_iindent \_llap{[\_the\_bibnum] }\_fi
}
\_def \_bibskip {\_ifnum\_bibnum>0 \_smallskip \_fi}
\_doc -----------------------------
The `\usebib` command is implemted in `usebib.opm` file which is loaded
when the `\usebib` command is firstly used.
The `usebib.opm` file loads the `librarian.tex` for scaning the `.bib`
files. This macro is external created by Paul Isambert. This is only one
such situation where \OpTeX/ macros depends on an external macro.
\_cod -----------------------------
\_def\_usebib{\_par \_opinput {usebib.opm} \_usebib}
\_def\usebib{\_usebib}
\_doc -----------------------------
The macros above works if all `\cite` (or similar) commands are used
before the `\usebib` command is used because `\usebib` prints only such
bib-entries their <labels> are saved in the `\_citelist`. But if some
`\cite` is used after `\usebib`, then `\usebib` sets `\_addcitelist` to
`\_writeXcite`, so such `\cite` saves the information to the
`.ref`file in the format `\_Xcite{<label>}`. Such information are copied
to `\_citelistB` during reading `.ref` file and `\usebib` concats two
lists of <labels> from `\_citelist` and `\_citelistB` and
uses this concatenated list.
\_cod -----------------------------
\_def\_Xcite#1{\_addto\_citelistB{\_citeI[#1]}}
\_def\_writeXcite#1{\_openref\_immediate\_wref\_Xcite{{#1}}}
\_def\_citelistB{}
\_endcode % -------------------------------------
See end of the `usebib.opm` file for documentation about creating style
files `bib-<style>.opm`.
See end of the `bib-iso690.opm` file for large documentation about `.bib` files
structure and about usage of `iso690` bib-style.
|
