oc-csl.el: Add support for sub-bibliographies
* lisp/oc-csl.el (org-cite-csl--rendered-bibliographies): New function to collect all #+print_bibliography keywords with their properties and call Citeproc to render all sub-bibliographies in one go as required by the API. Return the formatted bibliographies as values in an alist in which keys are the #+print_bibliography keyword options as plists. Cache the return value in the export communication channel. (org-cite-csl--bibliography-filter): New helper function to convert plists representing #+print_bibliography options to the alist filter form expected by Citeproc. (org-cite-csl--rendered-citations): Call `org-cite-csl--rendered-bibliographies' before rendering citations to make sure that the complete sub-bibliography information is added to the processor and, therefore, citation numbers are correct. (org-cite-csl--render-bibliography): Instead of directly calling Citeproc to render the bibliography, call `org-cite-csl--rendered-bibliographies' and retrieve the formatted bibliography from its return value based on the options passed as the `props' argument.
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etc/ORG-NEWS
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etc/ORG-NEWS
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@ -239,7 +239,7 @@ This behaviour can be changed by supplying a =:align= parameter.
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The tabbing environment can be useful when generating simple tables which
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can be span multiple pages and when table cells are allowed to overflow.
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*** Support for =nocite= citations in the "csl" export processor
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*** Support for =nocite= citations and sub-bibliographies in the "csl" export processor
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The "csl" citation export processor now supports =nocite= style
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citations that add items to the printed bibliography without visible
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@ -251,6 +251,17 @@ instance,
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#+end_src
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includes all available items in the printed bibliography.
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The "csl" export processor now also supports sub-bibliographies that
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show only a subset of the references based on some criterion. For
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example,
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#+begin_src org
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#+print_bibliography: :type book :keyword ai
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#+end_src
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prints a sub-bibliography containing the book entries with =ai= among
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their keywords.
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** New functions and changes in function arguments
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*** ~org-fold-show-entry~ does not fold drawers by default anymore
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@ -90,11 +90,23 @@
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;; The part of the suffix before the locator is appended to reference's prefix.
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;; If no locator term is used, but a number is present, then "page" is assumed.
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;; Filtered sub-bibliographies can be printed by passing filtering
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;; options to the "print_bibliography" keywords. E.g.,
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;;
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;; #+print_bibliography: :type book keyword: emacs
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;;
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;; If you need to use a key multiple times, you can separate its
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;; values with commas, but without any space in-between:
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;;
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;; #+print_bibliography: :keyword abc,xyz :type article
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;; This library was heavily inspired by and borrows from András Simonyi's
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;; Citeproc Org (<https://github.com/andras-simonyi/citeproc-org>) library.
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;; Many thanks to him!
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;;; Code:
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(require 'cl-lib)
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(require 'map)
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(require 'bibtex)
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(require 'json)
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(require 'oc)
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@ -559,6 +571,10 @@ OUTPUT using Citeproc."
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(citeproc-append-citations structures processor))
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(when nocite-ids
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(citeproc-add-uncited nocite-ids processor))
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;; All bibliographies have to be rendered in order to have
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;; correct citation numbers even if there are several
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;; sub-bibliograhies.
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(org-cite-csl--rendered-bibliographies info)
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(let (result
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(rendered (citeproc-render-citations
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processor
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@ -572,6 +588,62 @@ OUTPUT using Citeproc."
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(plist-put info :cite-citeproc-rendered-citations result)
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result))))
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(defun org-cite-csl--bibliography-filter (bib-props)
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"Return the sub-bibliography filter corresponding to bibliography properties.
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BIB-PROPS should be a plist representing the properties
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associated with a \"print_bibliography\" keyword, as returned by
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`org-cite-bibliography-properties'."
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(let (result
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(remove-keyword-colon (lambda (x) (intern (substring (symbol-name x) 1)))))
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(map-do
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(lambda (key value)
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(pcase key
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((or :keyword :notkeyword :nottype :notcsltype :filter)
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(dolist (v (split-string value ","))
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(push (cons (funcall remove-keyword-colon key) v) result)))
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((or :type :csltype)
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(if (string-match-p "," value)
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(user-error "The \"%s\" print_bibliography option does not support comma-separated values" key)
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(push (cons (funcall remove-keyword-colon key) value) result)))))
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bib-props)
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result))
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(defun org-cite-csl--rendered-bibliographies (info)
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"Return the rendered bibliographies.
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INFO is the export state, as a property list.
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Return an (OUTPUTS PARAMETERS) list where OUTPUTS is an alist
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of (BIB-PROPS . OUTPUT) pairs where each key is a property list
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of a \"print_bibliography\" keyword and the corresponding OUTPUT
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value is the bibliography as rendered by Citeproc."
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(or (plist-get info :cite-citeproc-rendered-bibliographies)
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(let (bib-plists bib-filters)
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;; Collect bibliography property lists and the corresponding
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;; Citeproc sub-bib filters.
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(org-element-map (plist-get info :parse-tree) 'keyword
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(lambda (keyword)
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(when (equal "PRINT_BIBLIOGRAPHY" (org-element-property :key keyword))
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(let ((bib-plist (org-cite-bibliography-properties keyword)))
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(push bib-plist bib-plists)
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(push (org-cite-csl--bibliography-filter bib-plist) bib-filters)))))
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(setq bib-filters (nreverse bib-filters)
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bib-plists (nreverse bib-plists))
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;; Render and return all bibliographies.
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(let ((processor (org-cite-csl--processor info)))
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(citeproc-add-subbib-filters bib-filters processor)
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(pcase-let* ((format (org-cite-csl--output-format info))
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(`(,rendered-bibs . ,parameters)
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(citeproc-render-bib
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(org-cite-csl--processor info)
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format
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(org-cite-csl--no-citelinks-p info)))
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(outputs (cl-mapcar #'cons bib-plists rendered-bibs))
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(result (list outputs parameters)))
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(plist-put info :cite-citeproc-rendered-bibliographies result)
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result)))))
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;;; Export capability
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(defun org-cite-csl-render-citation (citation _style _backend info)
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@ -585,16 +657,13 @@ INFO is the export state, as a property list."
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;; process.
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(org-cite-parse-objects output))))
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(defun org-cite-csl-render-bibliography (_keys _files _style _props _backend info)
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(defun org-cite-csl-render-bibliography (_keys _files _style props _backend info)
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"Export bibliography.
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INFO is the export state, as a property list."
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(org-cite-csl--barf-without-citeproc)
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(pcase-let* ((format (org-cite-csl--output-format info))
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(`(,output . ,parameters)
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(citeproc-render-bib
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(org-cite-csl--processor info)
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format
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(org-cite-csl--no-citelinks-p info))))
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(pcase-let* ((format (org-cite-csl--output-format info))
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(`(,outputs ,parameters) (org-cite-csl--rendered-bibliographies info))
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(output (cdr (assoc props outputs))))
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(pcase format
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('html
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(concat
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