From 5d5060a5da9eee99cdd50bc477e70d3c1d0ef38f Mon Sep 17 00:00:00 2001
From: Kévin Le Gouguec <kevin.legouguec@gmail.com>
Date: Wed, 17 Mar 2021 12:48:00 +0100
Subject: Commit a collection of tweaks to Emacs config

---
 .emacs | 35 +++++++++++++++++++++++++++++++++--
 1 file changed, 33 insertions(+), 2 deletions(-)

(limited to '.emacs')

diff --git a/.emacs b/.emacs
index 7d3e54d..2b6c443 100644
--- a/.emacs
+++ b/.emacs
@@ -96,6 +96,22 @@
     (set-variable 'tab-width new-width)
     (message "changed from %s to %s" old-width new-width)))
 
+(defun my/center-window (text-width)
+  (interactive
+   (list (cond
+          ;; Explicit length.
+          ((integerp current-prefix-arg)
+           current-prefix-arg)
+          ;; C-u.
+          ((and (listp current-prefix-arg) current-prefix-arg)
+           nil)
+          ;; Default.
+           (80))))
+  (let ((margin-width (when text-width
+                        (/ (- (window-width) text-width) 2))))
+    ;; Only set left margin, so that long lines are not truncated.
+    (set-window-margins nil margin-width)))
+
 (defun my/kill (stuff)
   (kill-new stuff)
   (message stuff))
@@ -149,7 +165,8 @@
 
 (my/define-prefix-command my/display-map
   "Keymap for display-related commands."
-  '(("t" toggle-truncate-lines)
+  '(("c" my/center-window)
+    ("t" toggle-truncate-lines)
     ("v" visual-line-mode)))
 
 (my/define-prefix-command my/editing-map
@@ -177,7 +194,8 @@
 (my/define-prefix-command my/manual-map
   "Keymap for reading manuals."
   '(("i" info-display-manual)
-    ("m" man)))
+    ("m" man)
+    ("s" shortdoc-display-group)))
 
 (my/define-prefix-command my/project-map
   "Keymap for project-related commands."
@@ -274,6 +292,8 @@
 ;; in stone, and I would miss out on future updates by Magit.
 (add-hook 'git-commit-setup-hook 'git-commit-turn-on-flyspell)
 
+(setq magit-process-finish-apply-ansi-colors t)
+
 (defun my/revision-at-point ()
   (cond
    ((derived-mode-p 'magit-mode)
@@ -490,4 +510,15 @@
 
 (setq-default paragraph-start (concat "[ 	]*- \\|" paragraph-start))
 
+(defun my/screenshot (output)
+  (interactive
+   (list
+    (let ((default (format-time-string "/tmp/Emacs-Screenshot-%F-%T.pdf")))
+      (read-file-name (format-prompt "Output?" default) nil default))))
+  (let ((data (x-export-frames))
+        (buf (find-file output)))
+    (insert data)
+    (save-buffer)
+    (kill-buffer buf)))
+
 ;; TODO: decruftify mode-line (e.g. remove superflous parens)
-- 
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