From d68aafc926e350256aad4e1a766922119cb366b3 Mon Sep 17 00:00:00 2001
From: Eshel Yaron <eshel@dazz.io>
Date: Fri, 17 Jun 2022 23:15:21 +0300
Subject: [PATCH] Add Presentation mode section

---
 .emacs.d/esy.org | 107 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)

diff --git a/.emacs.d/esy.org b/.emacs.d/esy.org
index 6053b50..fb6a3ee 100644
--- a/.emacs.d/esy.org
+++ b/.emacs.d/esy.org
@@ -348,6 +348,7 @@ For a list of available frame parameters, see [[info:elisp#Frame Parameters][eli
   (set-scroll-bar-mode nil)
   (pixel-scroll-precision-mode)
   (put 'narrow-to-region 'disabled nil)
+  (put 'narrow-to-page 'disabled nil)
   (put 'suspend-frame 'disabled t)
 #+end_src
 
@@ -846,6 +847,7 @@ refiling directly into deeper headings as well.
     (global-set-key (kbd "C-,") #'backward-delete-char)
     (global-set-key (kbd "C-.") #'embark-act)
     (global-set-key (kbd "C-;") #'avy-goto-char-timer)
+    (global-set-key (kbd "C-s-p") #'esy/present-buffer)
     (global-set-key (kbd "C-s-f") #'toggle-frame-fullscreen)
     (global-set-key (kbd "C-s-l") #'esy/pulse-line))
 
@@ -1419,6 +1421,111 @@ without asking each time.
       (add-to-list 'project-switch-commands '(magit-project-status "Magit") t)))
 #+end_src
 
+* Presentation mode
+:PROPERTIES:
+:CUSTOM_ID: presentation-mode
+:END:
+
+** Minor mode for moving between Org headings in a narrowed buffer
+:PROPERTIES:
+:CUSTOM_ID: org-present
+:END:
+#+begin_src emacs-lisp
+  (defun org-present-forward-heading-same-level (arg)
+    (interactive "p" org-mode)
+    (org-present-widen-and-narrow #'org-forward-heading-same-level
+                                  `(,arg t)))
+
+  (defun org-present-backward-heading-same-level (arg)
+    (interactive "p" org-mode)
+    (org-present-widen-and-narrow #'org-backward-heading-same-level
+                                  `(,arg t)))
+
+  (defun org-present-next-visible-heading (arg)
+    (interactive "p" org-mode)
+    (org-present-widen-and-narrow #'org-next-visible-heading
+                                  `(,arg)))
+
+  (defun org-present-previous-visible-heading (arg)
+    (interactive "p" org-mode)
+    (org-present-widen-and-narrow #'org-previous-visible-heading
+                                  `(,arg)))
+
+  (defun org-present-up-heading (arg)
+    (interactive "p" org-mode)
+    (org-present-widen-and-narrow #'outline-up-heading
+                                  `(,arg t)))
+
+  (defun org-present-widen-and-narrow (f args)
+    (widen)
+    (apply f args)
+    (org-narrow-to-subtree)
+    (outline-hide-subtree)
+    (outline-show-branches)
+    (org-show-entry)
+    (org-show-children))
+
+  (define-minor-mode org-present-mode
+    "Minor mode for automatic widening and narrowing in Org mode."
+    :init-value nil
+    :keymap '(([ remap org-forward-heading-same-level   ]
+               . org-present-forward-heading-same-level )
+              ([ remap org-backward-heading-same-level  ]
+               . org-present-backward-heading-same-level)
+              ([ remap org-next-visible-heading         ]
+               . org-present-next-visible-heading       )
+              ([ remap outline-next-visible-heading     ]
+               . org-present-next-visible-heading       )
+              ([ remap org-previous-visible-heading     ]
+               . org-present-previous-visible-heading   )
+              ([ remap outline-previous-visible-heading ]
+               . org-present-previous-visible-heading   )
+              ([ remap outline-up-heading               ]
+               . org-present-up-heading                 )))
+#+end_src
+
+** =logos= configuration
+:PROPERTIES:
+:CUSTOM_ID: logos
+:END:
+#+begin_src emacs-lisp
+  (defun esy/logos-focus ()
+    (when (eq major-mode 'org-mode)
+      (org-show-all)
+      (logos--mode 'org-present-mode 1)
+      (logos--mode 'org-modern-mode  1))
+    (logos--set  'cursor-type 'hbar)
+    (logos--set  'text-scale-mode-amount 4)
+    (logos--mode 'text-scale-mode 1)
+    (logos--mode 'display-line-numbers-mode -1)
+    (logos--mode 'global-hl-line-mode -1)
+    (logos--mode 'diff-hl-mode -1)
+    (logos--mode 'display-fill-column-indicator-mode -1)
+    (logos--mode 'flymake-mode -1))
+
+  (with-eval-after-load 'olivetti
+    (setq olivetti-body-width 80))
+
+  (with-eval-after-load 'logos
+    (setq-default logos-olivetti               t
+                  logos-hide-fringe            t
+                  logos-scroll-lock            t
+                  logos-variable-pitch         nil
+                  logos-buffer-read-only       t
+                  logos-hide-mode-line         t
+                  logos-hide-buffer-boundaries t)
+
+
+    (add-hook 'logos-focus-mode-extra-functions #'esy/logos-focus)
+    (add-hook 'logos-focus-mode-extra-functions #'delete-other-windows))
+
+  (defun esy/present-buffer ()
+    (interactive)
+    (require 'outline)
+    (require 'logos)
+    (logos-focus-mode 'toggle))
+#+end_src
+
 * Misc. settings
 :PROPERTIES:
 :CUSTOM_ID: misc
-- 
2.39.5