forked from mirrors/org-mode
org-export-with-buffer-copy: Allow safe reusable buffer copy
* lisp/ox.el (org-export--generate-copy-script): (org-export-copy-buffer): Accept cl-style key arguments. * lisp/ox.el (org-export-with-buffer-copy): Allow optional cl-style key arguments for fine-grained control on what to copy from the target buffer and which buffer to use as a target. Do not kill the target buffer upon finished, when the target is provided. Make sure that remaining buffer copy does not preserve `buffer-file-name' from the original buffer and that it never overwrites the file associated with the original buffer. * lisp/ox-html.el (org-html-format-latex): Use the new version of `org-export-with-buffer-copy' instead of managing edge cases by itself. Reported-by: Rudolf Adamkovič <salutis@me.com> Link: https://orgmode.org/list/87zge8j5iu.fsf@localhost
This commit is contained in:
Ihor Radchenko
parent
e7feeb2225
commit
192742c9c5
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@ -2879,25 +2879,14 @@ INFO is a plist containing export properties."
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;; temporary buffer so that dvipng/imagemagick can properly
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;; turn the fragment into an image.
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(setq latex-frag (concat latex-header latex-frag))))
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(with-current-buffer
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(org-export-copy-buffer
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(get-buffer-create " *Org HTML Export LaTeX*")
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'drop-visible 'drop-narrowing 'drop-contents)
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(erase-buffer)
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(insert latex-frag)
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(org-format-latex cache-relpath nil nil cache-dir nil
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"Creating LaTeX Image..." nil processing-type)
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;; Present save dialogue to be shown for this buffer and prevent
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;; Emacs to jump into this buffer when opening
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;; `buffer-file-name' file. We need this because
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;; `org-export-copy-buffer' copies `buffer-file-name' local
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;; variable thus making Emacs think that the buffer copy is
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;; associated with file. Note that despite `buffer-file-name',
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;; `org-export-copy-buffer' arranges saving to not perform
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;; actual writing onto the disk.
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(setq buffer-file-name nil)
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(restore-buffer-modified-p nil)
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(buffer-string))))
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(org-export-with-buffer-copy
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:to-buffer (get-buffer-create " *Org HTML Export LaTeX*")
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:drop-visibility t :drop-narrowing t :drop-contents t
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(erase-buffer)
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(insert latex-frag)
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(org-format-latex cache-relpath nil nil cache-dir nil
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"Creating LaTeX Image..." nil processing-type)
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(buffer-string))))
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(defun org-html--wrap-latex-environment (contents _ &optional caption label)
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"Wrap CONTENTS string within appropriate environment for equations.
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80
lisp/ox.el
80
lisp/ox.el
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@ -2544,9 +2544,9 @@ Return the updated communication channel."
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;; a default template (or a back-end specific template) at point or in
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;; current subtree.
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(defun org-export-copy-buffer (&optional buffer drop-visibility
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drop-narrowing drop-contents
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drop-locals)
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(cl-defun org-export-copy-buffer (&key to-buffer drop-visibility
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drop-narrowing drop-contents
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drop-locals)
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"Return a copy of the current buffer.
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The copy preserves Org buffer-local variables, visibility and
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narrowing.
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@ -2561,61 +2561,81 @@ then re-opened. Making edits in the buffer copy may also trigger
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Emacs save dialogue. Prefer using `org-export-with-buffer-copy' macro
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when possible.
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When optional argument BUFFER is non-nil, copy into BUFFER.
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When optional key `:to-buffer' is non-nil, copy into BUFFER.
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Optional arguments DROP-VISIBILITY, DROP-NARROWING, DROP-CONTENTS, and
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DROP-LOCALS are passed to `org-export--generate-copy-script'."
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Optional keys `:drop-visibility', `:drop-narrowing', `:drop-contents',
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and `:drop-locals' are passed to `org-export--generate-copy-script'."
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(let ((copy-buffer-fun (org-export--generate-copy-script
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(current-buffer)
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'do-not-check-unreadable
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drop-visibility
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drop-narrowing
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drop-contents
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drop-locals))
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(new-buf (or buffer (generate-new-buffer (buffer-name)))))
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:copy-unreadable 'do-not-check
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:drop-visibility drop-visibility
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:drop-narrowing drop-narrowing
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:drop-contents drop-contents
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:drop-locals drop-locals))
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(new-buf (or to-buffer (generate-new-buffer (buffer-name)))))
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(with-current-buffer new-buf
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(funcall copy-buffer-fun)
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(set-buffer-modified-p nil))
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new-buf))
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(defmacro org-export-with-buffer-copy (&rest body)
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(cl-defmacro org-export-with-buffer-copy ( &rest body
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&key to-buffer drop-visibility
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drop-narrowing drop-contents
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drop-locals
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&allow-other-keys)
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"Apply BODY in a copy of the current buffer.
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The copy preserves local variables, visibility and contents of
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the original buffer. Point is at the beginning of the buffer
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when BODY is applied."
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when BODY is applied.
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Optional keys can modify what is being copied and the generated buffer
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copy. `:to-buffer', `:drop-visibility', `:drop-narrowing',
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`:drop-contents', and `:drop-locals' are passed as arguments to
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`org-export-copy-buffer'."
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(declare (debug t))
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(org-with-gensyms (buf-copy)
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`(let ((,buf-copy (org-export-copy-buffer)))
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`(let ((,buf-copy (org-export-copy-buffer
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:to-buffer ,to-buffer
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:drop-visibility ,drop-visibility
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:drop-narrowing ,drop-narrowing
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:drop-contents ,drop-contents
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:drop-locals ,drop-locals)))
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(unwind-protect
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(with-current-buffer ,buf-copy
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(goto-char (point-min))
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(progn ,@body))
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(prog1
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(progn ,@body)
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;; `org-export-copy-buffer' carried the value of
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;; `buffer-file-name' from the original buffer. When not
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;; killed, the new buffer copy may become a target of
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;; `find-file'. Prevent this.
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(setq buffer-file-name nil)))
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(and (buffer-live-p ,buf-copy)
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;; Kill copy without confirmation.
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(progn (with-current-buffer ,buf-copy
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(restore-buffer-modified-p nil))
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(kill-buffer ,buf-copy)))))))
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(unless ,to-buffer
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(kill-buffer ,buf-copy))))))))
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(defun org-export--generate-copy-script (buffer
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&optional
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copy-unreadable
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drop-visibility
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drop-narrowing
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drop-contents
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drop-locals)
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(cl-defun org-export--generate-copy-script (buffer
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&key
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copy-unreadable
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drop-visibility
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drop-narrowing
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drop-contents
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drop-locals)
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"Generate a function duplicating BUFFER.
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The copy will preserve local variables, visibility, contents and
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narrowing of the original buffer. If a region was active in
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BUFFER, contents will be narrowed to that region instead.
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When optional argument COPY-UNREADABLE is non-nil, do not ensure that
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all the copied local variables will be readable in another Emacs
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session.
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When optional key `:copy-unreadable' is non-nil, do not ensure that all
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the copied local variables will be readable in another Emacs session.
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When optional arguments DROP-VISIBILITY, DROP-NARROWING,
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DROP-CONTENTS, or DROP-LOCALS are non-nil, do not preserve visibility,
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narrowing, contents, or local variables correspondingly.
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When optional keys `:drop-visibility', `:drop-narrowing',
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`:drop-contents', or `:drop-locals' are non-nil, do not preserve
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visibility, narrowing, contents, or local variables correspondingly.
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The resulting function can be evaluated at a later time, from
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another buffer, effectively cloning the original buffer there.
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