>From fc91322e9f8e47484767b66fb9f438d3326ccc08 Mon Sep 17 00:00:00 2001
From: TEC <t...@tecosaur.com>
Date: Sun, 24 May 2020 23:35:33 +0800
Subject: [PATCH] Extend org-edit-special to editing LaTeX-fragments Defines a
new function, `org-edit-latex-fragment' which is hooked into
`org-edit-special', modifying `org-src--contents-area-modified' to recognise
the element type.
---
lisp/org-src.el | 45 +++++++++++++++++++++++++++++++++++++++++++++
lisp/org.el | 1 +
2 files changed, 46 insertions(+)
diff --git a/lisp/org-src.el b/lisp/org-src.el
index c9eef744e..3be0793a8 100644
--- a/lisp/org-src.el
+++ b/lisp/org-src.el
@@ -363,6 +363,12 @@ where BEG and END are buffer positions and CONTENTS is a string."
(end (progn (goto-char (org-element-property :end datum))
(search-backward "}" (line-beginning-position) t))))
(list beg end (buffer-substring-no-properties beg end))))
+ ((eq type 'latex-fragment)
+ (let ((beg (org-element-property :begin datum))
+ (end (org-with-point-at (org-element-property :end datum)
+ (skip-chars-backward " \t")
+ (point))))
+ (list beg end (buffer-substring-no-properties beg end))))
((org-element-property :contents-begin datum)
(let ((beg (org-element-property :contents-begin datum))
(end (org-element-property :contents-end datum)))
@@ -959,6 +965,45 @@ Throw an error when not at such a table."
(table-recognize)
t))
+(defun org-edit-latex-fragment ()
+ "Edit LaTeX fragment at point."
+ (interactive)
+ (let* ((context (org-element-context))
+ (_ (unless (and (eq (org-element-type context) 'latex-fragment)
+ (org-src--on-datum-p context))
+ (user-error "Not on a LaTeX fragment")))
+ ;; Grab the LaTeX fragment for propertization
+ (contents (buffer-substring-no-properties
+ (org-element-property :begin context)
+ (- (org-element-property :end context)
+ (org-element-property :post-blank context))))
+ (delim-length (if (string-match "\\$[^$]" (substring contents 0 2))
+ 1 2)))
+ ;; make the LaTeX deliminators read-only
+ (add-text-properties
+ 0 delim-length
+ '(read-only "Cannot edit LaTeX deliminator" front-sticky t rear-nonsticky t)
+ contents)
+ (add-text-properties
+ (- (length contents) delim-length)
+ (length contents)
+ '(read-only "Cannot edit LaTeX deliminator" front-sticky nil rear-nonsticky nil)
+ contents)
+ (org-src--edit-element
+ context
+ (org-src--construct-edit-buffer-name (buffer-name) "LaTeX fragment")
+ (org-src-get-lang-mode "latex")
+ (lambda ()
+ ;; Blank lines break things, replace with a single newline
+ (while (re-search-forward "\n[ \t]*\n" nil t) (replace-match "\n"))
+ ;; If within a table a newline would disrupt the structure,
+ (goto-char (point-min))
+ (when (org-element-lineage context '(table-cell))
+ (while (search-forward "\n" nil t) (replace-match " ")))
+ )
+ contents)
+ t))
+
(defun org-edit-latex-environment ()
"Edit LaTeX environment at point.
\\<org-src-mode-map>
diff --git a/lisp/org.el b/lisp/org.el
index dcd446745..2f5b89231 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -17340,6 +17340,7 @@ Otherwise, return a user error."
(pcase (org-element-type context)
(`footnote-reference (org-edit-footnote-reference))
(`inline-src-block (org-edit-inline-src-code))
+ (`latex-fragment (org-edit-latex-fragment))
(`timestamp (if (eq 'inactive (org-element-property :type context))
(call-interactively #'org-time-stamp-inactive)
(call-interactively #'org-time-stamp)))
--
2.26.2
