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;;; org-tempo.el --- Template expansion for Org structures -*- lexical-binding: t; -*-
;; Copyright (C) 2017-2021 Free Software Foundation, Inc.
;;
;; Author: Rasmus Pank Roulund <emacs at pank dot eu>
;; Keywords: outlines, hypermedia, calendar, wp
;; Homepage: https://orgmode.org
;;
;; This file is part of GNU Emacs.
;;
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;
;;; Commentary:
;;
;; Org Tempo reimplements completions of structure template before
;; point like `org-try-structure-completion' in Org v9.1 and earlier.
;; For example, strings like "<e" at the beginning of the line will be
;; expanded to an example block.
;;
;; All blocks defined in `org-structure-template-alist' are added as
;; Org Tempo shortcuts, in addition to keywords defined in
;; `org-tempo-keywords-alist'.
;;
;; `tempo' can also be used to define more sophisticated keywords
;; completions. See the section "Additional keywords" below for
;; examples.
;;
;;; Code:
(require 'tempo)
(require 'cl-lib)
(require 'org)
(defvar org-structure-template-alist)
(defgroup org-tempo nil
"Template expansion of Org structures."
:tag "Org structure"
:group 'org)
(defvar org-tempo-tags nil
"Tempo tags for Org mode.")
(defcustom org-tempo-keywords-alist
'(("L" . "latex")
("H" . "html")
("A" . "ascii")
("i" . "index"))
"Keyword completion elements.
This is an alist of KEY characters and corresponding KEYWORDS,
just like `org-structure-template-alist'. The tempo snippet
\"<KEY\" will be expanded using the KEYWORD value. For example
\"<L\" at the beginning of a line is expanded to \"#+latex:\".
Do not use \"I\" as a KEY, as it it reserved for expanding
\"#+include\"."
:group 'org-tempo
:type '(repeat (cons (string :tag "Key")
(string :tag "Keyword")))
:package-version '(Org . "9.2"))
;;; Org Tempo functions and setup.
(defun org-tempo-setup ()
"Setup tempo tags and match finder for the current buffer."
(org-tempo--update-maybe)
(tempo-use-tag-list 'org-tempo-tags)
(setq-local tempo-match-finder "^ *\\(<[[:word:]]+\\)\\="))
(defun org-tempo--keys ()
"Return a list of all Org Tempo expansion strings, like \"<s\"."
(mapcar (lambda (pair) (format "<%s" (car pair)))
(append org-structure-template-alist
org-tempo-keywords-alist)))
(defun org-tempo--update-maybe ()
"Check and add new Org Tempo templates if necessary.
In particular, if new entries were added to
`org-structure-template-alist' or `org-tempo-keywords-alist', new
Tempo templates will be added."
(unless (cl-every (lambda (key) (assoc key org-tempo-tags))
(org-tempo--keys))
(org-tempo-add-templates)))
(defun org-tempo-add-templates ()
"Update all Org Tempo templates.
Go through `org-structure-template-alist' and
`org-tempo-keywords-alist' and update tempo templates."
(mapc 'org--check-org-structure-template-alist '(org-structure-template-alist
org-tempo-keywords-alist))
(let ((keys (org-tempo--keys)))
;; Check for duplicated snippet keys and warn if any are found.
(when (> (length keys) (length (delete-dups keys)))
(warn
"Duplicated keys in `org-structure-template-alist' and `org-tempo-keywords-alist'"))
;; Remove any keys already defined in case they have been updated.
(setq org-tempo-tags
(cl-remove-if (lambda (tag) (member (car tag) keys)) org-tempo-tags))
(mapc #'org-tempo-add-block org-structure-template-alist)
(mapc #'org-tempo-add-keyword org-tempo-keywords-alist)))
(defun org-tempo-add-block (entry)
"Add block entry from `org-structure-template-alist'."
(let* ((key (format "<%s" (car entry)))
(name (cdr entry))
(special (member name '("src" "export"))))
(tempo-define-template (format "org-%s" (replace-regexp-in-string " " "-" name))
`(,(format "#+begin_%s%s" name (if special " " ""))
,(when special 'p) '> n ,(unless special 'p) n
,(format "#+end_%s" (car (split-string name " ")))
>)
key
(format "Insert a %s block" name)
'org-tempo-tags)))
(defun org-tempo-add-keyword (entry)
"Add keyword entry from `org-tempo-keywords-alist'."
(let* ((key (format "<%s" (car entry)))
(name (cdr entry)))
(tempo-define-template (format "org-%s" (replace-regexp-in-string " " "-" name))
`(,(format "#+%s: " name) p '>)
key
(format "Insert a %s keyword" name)
'org-tempo-tags)))
(defun org-tempo-complete-tag (&rest _)
"Look for a tag and expand it silently.
Unlike to `tempo-complete-tag', do not give a signal if a partial
completion or no match at all is found. Return nil if expansion
didn't succeed."
(org-tempo--update-maybe)
;; `tempo-complete-tag' returns its SILENT argument when there is no
;; completion available at all.
(not (eq 'fail (tempo-complete-tag 'fail))))
;;; Additional keywords
(defun org-tempo--include-file ()
"Add #+include: and a file name."
(let ((inhibit-quit t))
(unless (with-local-quit
(prog1 t
(insert
(format "#+include: %S "
(file-relative-name
(read-file-name "Include file: "))))))
(insert "<I")
(setq quit-flag nil))))
(tempo-define-template "org-include"
'((org-tempo--include-file)
p >)
"<I"
"Include keyword"
'org-tempo-tags)
;;; Setup of Org Tempo
;;
;; Org Tempo is set up with each new Org buffer and potentially in the
;; current Org buffer.
(add-hook 'org-mode-hook 'org-tempo-setup)
(add-hook 'org-tab-before-tab-emulation-hook 'org-tempo-complete-tag)
;; Enable Org Tempo in all open Org buffers.
(dolist (b (org-buffer-list 'files))
(with-current-buffer b (org-tempo-setup)))
(provide 'org-tempo)
;;; org-tempo.el ends here
|
