From 2c87fa26f3a6abb9f12673bc633db11f0cb1b1c7 Mon Sep 17 00:00:00 2001
From: jao <jao@gnu.org>
Date: Tue, 29 Dec 2020 19:42:03 +0000
Subject: improvements to pdf org links

---
 org/jao-org-links.el | 81 +++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 58 insertions(+), 23 deletions(-)

diff --git a/org/jao-org-links.el b/org/jao-org-links.el
index 614bfaa..ab9b2d6 100644
--- a/org/jao-org-links.el
+++ b/org/jao-org-links.el
@@ -2,6 +2,17 @@
 (require 'pdf-info)
 
 (defvar jao-org--sink-dir "./")
+(defvar jao-org-open-pdf-fun 'jao-org--pdf-tools-open)
+
+(defun jao-org--pdf-tools-open (path page &optional height)
+  (org-open-file path 1)
+  (pdf-view-goto-page page)
+  (when height
+    (image-set-window-vscroll
+     (round (/ (* height (cdr (pdf-view-image-size))) (frame-char-height))))))
+
+(defun jao-org--pdf-open (path page &optional height)
+  (funcall (or jao-org-open-pdf-fun 'jao-org--pdf-tools-open) path page height))
 
 (defun jao-org--pdf-p (file) (string-match-p ".*\\.pdf$" file))
 
@@ -12,17 +23,12 @@
          (let* ((path (match-string 1 link))
                 (page (string-to-number (match-string 2 link)))
                 (height (string-to-number (match-string 3 link))))
-           (org-open-file path 1)
-           (pdf-view-goto-page page)
-           (image-set-window-vscroll
-            (round (/ (* height (cdr (pdf-view-image-size))) (frame-char-height))))))
+           (jao-org--pdf-open path page height)))
         ((string-match "\\(.*\\)::\\([0-9]+\\)$"  link)
          (let* ((path (match-string 1 link))
                 (page (string-to-number (match-string 2 link))))
-           (org-open-file path 1)
-           (pdf-view-goto-page page)))
-        (t
-         (org-open-file link 1))))
+           (jao-org--pdf-open path page)))
+        (t (org-open-file link 1))))
 
 (defun jao-org-links--follow-doc (link)
   (let* ((full-link (concat org-directory "/doc/" link))
@@ -41,15 +47,15 @@
   (let ((default-directory jao-org--sink-dir))
     (let ((f (replace-regexp-in-string "^file:" "doc:"
                                        (org-file-complete-link arg))))
-      (if (jao-org--pdf-p p)
+      (if (jao-org--pdf-p f)
           (concat f "::" (read-from-minibuffer "Page: " "1"))
         f))))
 
 (defsubst jao-org--title->file (title)
   (concat (mapconcat 'downcase (split-string title nil t) "-") ".pdf"))
 
-(defun jao-org--pdf-title ()
-  (let ((base (file-name-base (pdf-view-buffer-file-name))))
+(defun jao-org--pdf-title (&optional fname)
+  (let ((base (file-name-base (or fname (pdf-view-buffer-file-name)))))
     (capitalize (replace-regexp-in-string "-" " " base))))
 
 (defvar-local jao--pdf-outline nil)
@@ -66,16 +72,25 @@
       (when (<= cur-page page)
         (setq cur-title (cdr (assoc 'title (car outline)))))
       (setq outline (cdr outline)))
-    cur-title))
+    (replace-regexp-in-string "[[:blank:]]+" " " cur-title)))
+
+;;;###autoload
+(defvar jao-org-links-pdf-store-fun nil)
 
 (defun jao-org-links--store-pdf-link ()
-  (when (derived-mode-p 'pdf-view-mode)
-    (let ((path buffer-file-name)
-          (page (pdf-view-current-page)))
-      (org-store-link-props
-       :type "doc"
-       :link (format "doc:%s::%d" (file-name-nondirectory path) page)
-       :description (format "%s (p. %d)" (jao-org--pdf-section-title) page)))))
+  (or (when (fboundp jao-org-links-pdf-store-fun)
+        (funcall jao-org-links-pdf-store-fun))
+      (when (derived-mode-p 'pdf-view-mode)
+        (jao-org-links-store-pdf-link buffer-file-name
+                                      (pdf-view-current-page)
+                                      (jao-org--pdf-section-title)))))
+
+;;;###autoload
+(defun jao-org-links-store-pdf-link (path page title)
+  (org-store-link-props
+   :type "doc"
+   :link (format "doc:%s::%d" (file-name-nondirectory path) page)
+   :description (format "%s (p. %d)" title page)))
 
 ;;;###autoload
 (defun jao-org-insert-doc (title)
@@ -94,19 +109,39 @@
 (defun jao-org--open-other (otp)
   (let ((rxs ))))
 
+;;;###autoload
+(defun jao-org-org-to-pdf-file ()
+  (replace-regexp-in-string "/notes/\\(.+\\)\\.org$"
+                            "/doc/\\1.org"
+                            buffer-file-name))
+
+;;;###autoload
+(defun jao-org-pdf-to-org-file (&optional file-name)
+  (replace-regexp-in-string "/doc/\\(.+\\)\\.pdf$"
+                            "/notes/\\1.org"
+                            (or file-name buffer-file-name)))
+
+;;;###autoload
+(defun jao-org-insert-doc-skeleton (&optional title)
+  (insert "#+title: " (or title (jao-org--pdf-title (buffer-file-name)))
+          "\n#+author:\n#+startup: latexpreview\n\n"))
+
 ;;;###autoload
 (defun jao-org-pdf-goto-org (arg)
   (interactive "P")
   (when (jao-org--pdf-p buffer-file-name)
-    (let* ((file (replace-regexp-in-string "/doc/\\(.+\\)\\.pdf$"
-                                           "/notes/\\1.org"
-                                           buffer-file-name))
+    (let* ((file (jao-org-pdf-to-org-file))
            (new (not (file-exists-p file)))
            (title (jao-org--pdf-title)))
       (when (or arg new) (org-store-link nil t))
       (find-file-other-window file)
       (when new
-        (insert "#+title: " title "\n#+author:\n#+startup: latexpreview\n\n")
+        (jao-org-insert-doc-skeleton title)
         (org-insert-link)))))
 
+;;;###autoload
+(defun jao-org-pdf-goto-org* ()
+  (interactive)
+  (jao-org-pdf-goto-org t))
+
 (provide 'jao-org-links)
-- 
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