diff options
Diffstat (limited to 'lisp/org/org-src.el')
| -rw-r--r-- | lisp/org/org-src.el | 89 |
1 files changed, 64 insertions, 25 deletions
diff --git a/lisp/org/org-src.el b/lisp/org/org-src.el index cabedecb689..91a3d415dfa 100644 --- a/lisp/org/org-src.el +++ b/lisp/org/org-src.el @@ -2,7 +2,7 @@ ;; ;; Copyright (C) 2004-2021 Free Software Foundation, Inc. ;; -;; Author: Carsten Dominik <carsten at orgmode dot org> +;; Author: Carsten Dominik <carsten.dominik@gmail.com> ;; Bastien Guerry <bzg@gnu.org> ;; Dan Davison <davison at stats dot ox dot ac dot uk> ;; Keywords: outlines, hypermedia, calendar, wp @@ -299,6 +299,9 @@ is 0.") "File name associated to Org source buffer, or nil.") (put 'org-src-source-file-name 'permanent-local t) +(defvar-local org-src--preserve-blank-line nil) +(put 'org-src--preserve-blank-line 'permanent-local t) + (defun org-src--construct-edit-buffer-name (org-buffer-name lang) "Construct the buffer name for a source editing buffer." (concat "*Org Src " org-buffer-name "[ " lang " ]*")) @@ -327,8 +330,7 @@ a cons cell (LINE . COLUMN) or symbol `end'. See also (cons (count-lines beg (line-beginning-position)) ;; Column is relative to the end of line to avoid problems of ;; comma escaping or colons appended in front of the line. - (- (current-column) - (progn (end-of-line) (current-column))))))) + (- (point) (min end (line-end-position))))))) (defun org-src--goto-coordinates (coord beg end) "Move to coordinates COORD relatively to BEG and END. @@ -341,9 +343,9 @@ which see. BEG and END are buffer positions." (org-with-wide-buffer (goto-char beg) (forward-line (car coord)) - (end-of-line) - (org-move-to-column (max (+ (current-column) (cdr coord)) 0)) - (point))))) + (max (point) + (+ (min end (line-end-position)) + (cdr coord))))))) (defun org-src--contents-area (datum) "Return contents boundaries of DATUM. @@ -433,8 +435,8 @@ spaces after it as being outside." (line-end-position) (point)))))) -(defun org-src--contents-for-write-back () - "Return buffer contents in a format appropriate for write back. +(defun org-src--contents-for-write-back (write-back-buf) + "Populate WRITE-BACK-BUF with contents in the appropriate format. Assume point is in the corresponding edit buffer." (let ((indentation-offset (if org-src--preserve-indentation 0 @@ -444,27 +446,36 @@ Assume point is in the corresponding edit buffer." 0)))) (use-tabs? (and (> org-src--tab-width 0) t)) (source-tab-width org-src--tab-width) - (contents (org-with-wide-buffer (buffer-string))) - (write-back org-src--allow-write-back)) - (with-temp-buffer + (contents (org-with-wide-buffer + (let ((eol (line-end-position))) + (list (buffer-substring (point-min) eol) + (buffer-substring eol (point-max)))))) + (write-back org-src--allow-write-back) + (preserve-blank-line org-src--preserve-blank-line) + marker) + (with-current-buffer write-back-buf ;; Reproduce indentation parameters from source buffer. (setq indent-tabs-mode use-tabs?) (when (> source-tab-width 0) (setq tab-width source-tab-width)) ;; Apply WRITE-BACK function on edit buffer contents. - (insert (org-no-properties contents)) + (insert (org-no-properties (car contents))) + (setq marker (point-marker)) + (insert (org-no-properties (car (cdr contents)))) (goto-char (point-min)) (when (functionp write-back) (save-excursion (funcall write-back))) - ;; Add INDENTATION-OFFSET to every non-empty line in buffer, + ;; Add INDENTATION-OFFSET to every line in buffer, ;; unless indentation is meant to be preserved. (when (> indentation-offset 0) (while (not (eobp)) (skip-chars-forward " \t") - (unless (eolp) ;ignore blank lines + (when (or (not (eolp)) ; not a blank line + (and (eq (point) (marker-position marker)) ; current line + preserve-blank-line)) (let ((i (current-column))) (delete-region (line-beginning-position) (point)) (indent-to (+ i indentation-offset)))) (forward-line))) - (buffer-string)))) + (set-marker marker nil)))) (defun org-src--edit-element (datum name &optional initialize write-back contents remote) @@ -509,6 +520,11 @@ Leave point in edit buffer." (block-ind (org-with-point-at (org-element-property :begin datum) (current-indentation))) (content-ind org-edit-src-content-indentation) + (blank-line (save-excursion (beginning-of-line) + (looking-at-p "^[[:space:]]*$"))) + (empty-line (and blank-line (looking-at-p "^$"))) + (preserve-blank-line (or (and blank-line (not empty-line)) + (and empty-line (= (+ block-ind content-ind) 0)))) (preserve-ind (and (memq type '(example-block src-block)) (or (org-element-property :preserve-indent datum) @@ -557,6 +573,7 @@ Leave point in edit buffer." (setq org-src--overlay overlay) (setq org-src--allow-write-back write-back) (setq org-src-source-file-name source-file-name) + (setq org-src--preserve-blank-line preserve-blank-line) ;; Start minor mode. (org-src-mode) ;; Clear undo information so we cannot undo back to the @@ -587,7 +604,7 @@ Leave point in edit buffer." (defun org-src-font-lock-fontify-block (lang start end) "Fontify code block. -This function is called by emacs automatic fontification, as long +This function is called by Emacs' automatic fontification, as long as `org-src-fontify-natively' is non-nil." (let ((lang-mode (org-src-get-lang-mode lang))) (when (fboundp lang-mode) @@ -1190,20 +1207,27 @@ Throw an error if there is no such buffer." (interactive) (unless (org-src-edit-buffer-p) (user-error "Not in a sub-editing buffer")) (set-buffer-modified-p nil) - (let ((edited-code (org-src--contents-for-write-back)) + (let ((write-back-buf (generate-new-buffer "*org-src-write-back*")) (beg org-src--beg-marker) (end org-src--end-marker) (overlay org-src--overlay)) + (org-src--contents-for-write-back write-back-buf) (with-current-buffer (org-src-source-buffer) (undo-boundary) (goto-char beg) ;; Temporarily disable read-only features of OVERLAY in order to ;; insert new contents. (delete-overlay overlay) - (delete-region beg end) (let ((expecting-bol (bolp))) - (insert edited-code) + (if (version< emacs-version "27.1") + (progn (delete-region beg end) + (insert (with-current-buffer write-back-buf (buffer-string)))) + (save-restriction + (narrow-to-region beg end) + (replace-buffer-contents write-back-buf 0.1 nil) + (goto-char (point-max)))) (when (and expecting-bol (not (bolp))) (insert "\n"))) + (kill-buffer write-back-buf) (save-buffer) (move-overlay overlay beg (point)))) ;; `write-contents-functions' requires the function to return @@ -1213,30 +1237,45 @@ Throw an error if there is no such buffer." (defun org-edit-src-exit () "Kill current sub-editing buffer and return to source buffer." (interactive) - (unless (org-src-edit-buffer-p) (error "Not in a sub-editing buffer")) + (unless (org-src-edit-buffer-p) + (error "Not in a sub-editing buffer")) (let* ((beg org-src--beg-marker) (end org-src--end-marker) (write-back org-src--allow-write-back) (remote org-src--remote) (coordinates (and (not remote) (org-src--coordinates (point) 1 (point-max)))) - (code (and write-back (org-src--contents-for-write-back)))) + (write-back-buf + (and write-back (generate-new-buffer "*org-src-write-back*")))) + (when write-back (org-src--contents-for-write-back write-back-buf)) (set-buffer-modified-p nil) ;; Switch to source buffer. Kill sub-editing buffer. (let ((edit-buffer (current-buffer)) (source-buffer (marker-buffer beg))) - (unless source-buffer (error "Source buffer disappeared. Aborting")) + (unless source-buffer + (when write-back-buf (kill-buffer write-back-buf)) + (error "Source buffer disappeared. Aborting")) (org-src-switch-to-buffer source-buffer 'exit) (kill-buffer edit-buffer)) ;; Insert modified code. Ensure it ends with a newline character. (org-with-wide-buffer - (when (and write-back (not (equal (buffer-substring beg end) code))) + (when (and write-back + (not (equal (buffer-substring beg end) + (with-current-buffer write-back-buf + (buffer-string))))) (undo-boundary) (goto-char beg) - (delete-region beg end) (let ((expecting-bol (bolp))) - (insert code) + (if (version< emacs-version "27.1") + (progn (delete-region beg end) + (insert (with-current-buffer write-back-buf + (buffer-string)))) + (save-restriction + (narrow-to-region beg end) + (replace-buffer-contents write-back-buf 0.1 nil) + (goto-char (point-max)))) (when (and expecting-bol (not (bolp))) (insert "\n"))))) + (when write-back-buf (kill-buffer write-back-buf)) ;; If we are to return to source buffer, put point at an ;; appropriate location. In particular, if block is hidden, move ;; to the beginning of the block opening line. |