New doc-view library to keep track of visited documents

1 files changed, 75 insertions, 0 deletions

diff --git a/misc/jao-doc-view.el b/misc/jao-doc-view.el
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+;; jao-doc-view.el -- Remembering visited documents
+
+;; Copyright (c) 2013 Jose Antonio Ortega Ruiz
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
+;; Start date: Fri Feb 15, 2013 01:21
+
+;;; Comentary:
+
+;; Some utilities to keep track of visited documents and the last
+;; visited page.
+
+;;; Code:
+
+(defvar jao-doc-view-bmk-file "~/.emacs.d/doc-view-bmk")
+(defvar jao-doc-view--current-bmks nil)
+
+(defun jao-doc-view--read-bmks ()
+  (let* ((buff (find-file-noselect jao-doc-view-bmk-file))
+         (bmks (ignore-errors
+                 (with-current-buffer buff
+                   (goto-char (point-min)))
+                 (read buff))))
+    (if (hash-table-p bmks) bmks (make-hash-table :test 'equal))))
+
+(defun jao-doc-view--save-bmks ()
+  (with-current-buffer (find-file-noselect jao-doc-view-bmk-file)
+    (erase-buffer)
+    (insert (format "%S" (jao-doc-view--current-bmks)))
+    (save-buffer)))
+
+(defun jao-doc-view--current-bmks ()
+  (or jao-doc-view--current-bmks
+      (setq jao-doc-view--current-bmks (jao-doc-view--read-bmks))))
+
+(defun jao-doc-view-open (file)
+  (let* ((buffs (buffer-list))
+         (b (catch 'done
+              (while buffs
+                (when (string-equal (buffer-file-name (car buffs)) file)
+                  (throw 'done (car buffs)))
+                (setq buffs (cdr buffs))))))
+    (when (not b)
+      (find-file file)
+      (doc-view-goto-page (gethash (expand-file-name file)
+                                   (jao-doc-view--current-bmks) 1)))))
+
+(defun jao-doc-view--save-hook ()
+  (when (eq major-mode 'doc-view-mode)
+    (ignore-errors (puthash (buffer-file-name)
+                            (doc-view-current-page)
+                            (jao-doc-view--current-bmks))
+                   (jao-doc-view--save-bmks))))
+
+(eval-after-load "doc-view"
+  '(progn
+     (add-hook 'kill-buffer-hook 'jao-doc-view--save-hook)
+     (add-hook 'kill-emacs-hook 'jao-doc-view--save-bmks)))
+
+
+
+(provide 'jao-doc-view)