From 38646b8a1f9f5c4ce9d8554f66b272f2d08a4e18 Mon Sep 17 00:00:00 2001
From: jao <jao@gnu.org>
Date: Thu, 15 Apr 2021 22:37:22 +0100
Subject: integration of zathura with pdf sessions

---
 lib/doc/jao-doc-view.el | 11 +++++++----
 lib/eos/jao-afio.el     | 25 +++++++++++++------------
 2 files changed, 20 insertions(+), 16 deletions(-)

(limited to 'lib')

diff --git a/lib/doc/jao-doc-view.el b/lib/doc/jao-doc-view.el
index f917b96..f7984f0 100644
--- a/lib/doc/jao-doc-view.el
+++ b/lib/doc/jao-doc-view.el
@@ -30,6 +30,11 @@
 (require 'doc-view)
 
 (defvar jao-doc-view-session-file "~/.emacs.d/cache/doc-view-session.eld")
+(defvar-local jao-doc-view--is-pdf nil)
+
+(defun jao-doc-view-session-mark () (setq-local jao-doc-view--is-pdf t))
+(defun jao-doc-view--is-pdf ()
+  (or jao-doc-view--is-pdf (derived-mode-p 'doc-view-mode 'pdf-view-mode)))
 
 (defun jao-doc-view--read-file (file)
   (let ((buff (find-file-noselect file)))
@@ -54,16 +59,14 @@
         (cb (when skip-current (current-buffer))))
     (dolist (b (buffer-list))
       (with-current-buffer b
-        (when (and (derived-mode-p 'doc-view-mode 'pdf-view-mode)
-                   (not (equalp cb b)))
+        (when (and (jao-doc-view--is-pdf) (not (equalp cb b)))
           (add-to-list 'docs (buffer-file-name)))))
     (when (> (length docs) 0)
       (jao-doc-view--save-to-file jao-doc-view-session-file docs))
     (message "%s docs saved" (length docs))))
 
 (defun jao-doc-view--save-session-1 ()
-  (when (derived-mode-p 'pdf-view-mode 'doc-view-mode)
-    (jao-doc-view-save-session t)))
+  (when (jao-doc-view--is-pdf) (jao-doc-view-save-session t)))
 
 (defun jao-doc-view--save-session ()
   (let ((inhibit-message t)
diff --git a/lib/eos/jao-afio.el b/lib/eos/jao-afio.el
index d031e59..90abc7f 100644
--- a/lib/eos/jao-afio.el
+++ b/lib/eos/jao-afio.el
@@ -131,18 +131,19 @@
 (defvar jao-afio-switch-hook nil)
 
 (defun jao-afio--goto-frame (next &optional reset)
-  (let ((next-cfg (when (not reset) (get-register next))))
-    (window-configuration-to-register jao-afio--current-config)
-    (setq jao-afio--current-config next)
-    (if next-cfg
-        (jump-to-register next)
-      (delete-other-windows)
-      (cl-case next
-        (?w (jao-afio-open-www))
-        (?g (jao-afio-open-gnus))
-        (?p (jao-afio-open-doc))
-        (?s (delete-other-windows))))
-    (run-hooks 'jao-afio-switch-hook)))
+  (when (or reset (not (eq next jao-afio--current-config)))
+    (let ((next-cfg (when (not reset) (get-register next))))
+      (window-configuration-to-register jao-afio--current-config)
+      (setq jao-afio--current-config next)
+      (if next-cfg
+          (jump-to-register next)
+        (delete-other-windows)
+        (cl-case next
+          (?w (jao-afio-open-www))
+          (?g (jao-afio-open-gnus))
+          (?p (jao-afio-open-doc))
+          (?s (delete-other-windows))))
+      (run-hooks 'jao-afio-switch-hook))))
 
 (defun jao-afio--goto-main (&optional reset)
   (interactive "P")
-- 
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