From 6ec968e2cadca7e4df4aba8960e758aa6c7d00b0 Mon Sep 17 00:00:00 2001
From: Yuchen Pei <id@ypei.org>
Date: Thu, 7 Sep 2023 23:15:32 +1000
Subject: [emacs] Some small enhancement

Remove empty blocks automatically.
When org-insert-structure-template, with a prefix, auto yank into block and exit
---
 emacs/.emacs.d/lisp/my/my-gnus.el |  3 ++-
 emacs/.emacs.d/lisp/my/my-org.el  | 28 +++++++++++++++++++++++-----
 2 files changed, 25 insertions(+), 6 deletions(-)

(limited to 'emacs/.emacs.d/lisp')

diff --git a/emacs/.emacs.d/lisp/my/my-gnus.el b/emacs/.emacs.d/lisp/my/my-gnus.el
index 1f7ff18..9c42204 100644
--- a/emacs/.emacs.d/lisp/my/my-gnus.el
+++ b/emacs/.emacs.d/lisp/my/my-gnus.el
@@ -339,7 +339,8 @@ The archiving target comes from `my-gnus-group-alist'."
                     url)
               pairs))
       (while (and (shr-next-link)
-                  (<= (point) end))
+                  (<= (point) end)
+                  (button-at (point)))
         (let ((button (button-at (point))))
           (push (cons (buffer-substring-no-properties
                        (button-start button)
diff --git a/emacs/.emacs.d/lisp/my/my-org.el b/emacs/.emacs.d/lisp/my/my-org.el
index 43be91f..03b34ff 100644
--- a/emacs/.emacs.d/lisp/my/my-org.el
+++ b/emacs/.emacs.d/lisp/my/my-org.el
@@ -79,13 +79,25 @@ With a prefix, insert inactive dates.
   "A :before advice for org-edit-src-exit."
   (delete-trailing-whitespace))
 
+(defun my-org-element-block-p (element)
+  "Returns t if ELEMENT is an org block."
+  (memq (org-element-type element)
+			  '(center-block comment-block dynamic-block
+					             example-block export-block quote-block
+					             special-block src-block verse-block)))
+
 (defun my-org-edit-src-after-exit ()
   "An :after advice for org-edit-src-exit.
 
-Deactivate mark and move point to after the block."
+If the block is empty, remove it.
+Otherwise deactivate mark and move point to after the block."
   (deactivate-mark)
-  (re-search-forward "^[ \t]*#\\+end_")
-  (beginning-of-line 2))
+  (let ((element (org-element-at-point)))
+    (cl-assert (my-org-element-block-p element))
+    (if (string-empty-p (org-element-property :value element))
+        (delete-region (org-element-property :begin element)
+                       (org-element-property :end element))
+      (goto-char (org-element-property :end element)))))
 
 ;; navigation
 (defun my-org-jump-to-last-visible-child ()
@@ -1252,13 +1264,19 @@ Flush lines with only some common symbols."
   (interactive "p")
   (my-org-vote-up (- points)))
 
-;; used to add advice to `org-insert-structure-template'.
+;; used to add an :after advice to `org-insert-structure-template'.
 (require 'my-buffer)
 (defun my-org-edit-special (type)
+  "Choose mode if src block. Then enter edit special
+
+With a prefix arg, yank and exit immediately."
   (when (equal type "src")
     (insert (string-remove-suffix
              "-mode" (prin1-to-string (my-read-major-mode)))))
-  (org-edit-special))
+  (org-edit-special)
+  (when current-prefix-arg
+    (yank)
+    (org-edit-src-exit)))
 
 (defun my-link-to-line-number-in-prog-mode ()
   "When in prog-mode, use line number as search item."
-- 
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