center ascii banners in home buffers

also remove now unneeded leading whitespaces in ascii banners

core/banners/001-banner.txt

@@ -1,9 +1,9 @@
 
-  ┏━━━┓
-  ┃┏━┓┃ Welcome to
-  ┃┗━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏┓┏┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓ b
-  ┗━━┓┃┏━━┓┃┏┓┃┏━━┓┃┏┓┃┏━━┓┃┏━┛┏━━┓┃┃━┫┏━━┓┃┗┛┃┏━━┓┃┏┓┃┏━━┓┃┏━┛┏━━┓┃━━┫ e
-  ┃┗━┛┃┗━━┛┃┗┛┃┗━━┛┃┏┓┃┗━━┛┃┗━┓┗━━┛┃┃━┫┗━━┛┃┃┃┃┗━━┛┃┏┓┃┗━━┛┃┗━┓┗━━┛┣━━┃ t
-  ┗━━━┛╋╋╋╋┃┏━┛╋╋╋╋┗┛┗┛╋╋╋╋┗━━┛╋╋╋╋┗━━┛╋╋╋╋┗┻┻┛╋╋╋╋┗┛┗┛╋╋╋╋┗━━┛╋╋╋╋┗━━┛ a
-  ╋╋╋╋╋╋╋╋╋┃┃[The best editor is neither Emacs nor Vim, it's Emacs+Vim]
-  ╋╋╋╋╋╋╋╋╋┗┛
+┏━━━┓
+┃┏━┓┃ Welcome to
+┃┗━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏┓┏┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓╋╋╋╋┏━━┓ b
+┗━━┓┃┏━━┓┃┏┓┃┏━━┓┃┏┓┃┏━━┓┃┏━┛┏━━┓┃┃━┫┏━━┓┃┗┛┃┏━━┓┃┏┓┃┏━━┓┃┏━┛┏━━┓┃━━┫ e
+┃┗━┛┃┗━━┛┃┗┛┃┗━━┛┃┏┓┃┗━━┛┃┗━┓┗━━┛┃┃━┫┗━━┛┃┃┃┃┗━━┛┃┏┓┃┗━━┛┃┗━┓┗━━┛┣━━┃ t
+┗━━━┛╋╋╋╋┃┏━┛╋╋╋╋┗┛┗┛╋╋╋╋┗━━┛╋╋╋╋┗━━┛╋╋╋╋┗┻┻┛╋╋╋╋┗┛┗┛╋╋╋╋┗━━┛╋╋╋╋┗━━┛ a
+╋╋╋╋╋╋╋╋╋┃┃[The best editor is neither Emacs nor Vim, it's Emacs+Vim]
+╋╋╋╋╋╋╋╋╋┗┛

core/banners/003-banner.txt

@@ -1,17 +1,17 @@
 
-       ⠀⠀⠀⢀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
-       ⠀⣠⣾⣿⣿⣿⣷⣶⣤⣀⡤⣤⡒⢖⠖⢖⢒⠢⠤⢄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀
-       ⠠⣿⠛⠉⠁⢉⣹⢿⣿⣿⣿⣷⣼⢸⢸⢨⠢⡡⢑⡠⠀⠑⠢⢄⠀⠀⠀⠀⠀⠀
-       ⠨⡃⠀⢀⡴⡣⣗⢵⣣⢟⣟⣿⣿⣿⣎⡎⡎⡜⡐⢽⣾⡄⠀⠈⠑⢄⠀⠀⠀⠀
-       ⠀⢇⣠⢯⡪⣯⣺⢽⢾⣽⡽⣾⣺⣝⢿⣿⣼⢨⠢⡑⢿⣷⠀⠀⠀⠀⠳⡀⠀⠀
-       ⠀⡸⡪⡪⣿⣾⣺⡽⣿⣳⢯⡿⣵⢷⣝⢼⢻⣯⣎⠢⢹⣿⣇⠀⠀⠀⠀⠱⡀⠀
-       ⢰⡫⢪⢪⡘⠿⣿⣿⣿⣾⣯⣿⢽⡳⣕⢇⢗⢜⢻⣧⡡⣿⣿⡄⠀⠀⠀⠀⢣⠀    Welcome to
-       ⣞⢨⢊⢎⢆⠀⠀⠉⢿⣿⣿⣿⣿⣿⣷⣯⣮⣮⣦⣽⣿⣿⣿⣇⠀⠀⠀⠀⠈⡆
-       ⡧⢑⠔⡡⢣⠂⠀⠀⠀⢓⢝⢟⡻⡿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠀⠀⠀⠀⡇   [ S p a c e m a c s ]
-       ⡏⠄⠡⢊⢂⢅⠀⠀⠀⠀⠇⡇⠎⢎⠢⡩⠛⠻⢿⣿⣿⣿⣿⣿⡆⠀⠀⠀⢀⠇
-       ⢸⡀⡁⢁⠂⡂⠀⠀⠀⠀⠈⠔⡑⠡⢊⠐⡈⠌⢀⠀⠙⠻⢿⣿⣷⠀⠀⠀⡸⠀
-       ⠀⢣⠀⠀⠠⠈⠀⠀⠀⠀⠀⠀⠂⠌⠐⠠⠀⠀⠀⠀⠀⠀⠀⠈⠙⠀⠀⢠⠃⠀
-       ⠀⠀⢣⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠃⠀⠀
-       ⠀⠀⠀⠑⢄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠔⠁⠀⠀⠀
-       ⠀⠀⠀⠀⠀⠙⠤⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡠⠔⠁⠀⠀⠀⠀⠀
-        ⠀⠀⠀⠀⠀⠀⠀⠙⠒⠤⠤⣀⣀⣀⣀⣀⡠⠤⠔⠒⠉⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⢀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⣠⣾⣿⣿⣿⣷⣶⣤⣀⡤⣤⡒⢖⠖⢖⢒⠢⠤⢄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠠⣿⠛⠉⠁⢉⣹⢿⣿⣿⣿⣷⣼⢸⢸⢨⠢⡡⢑⡠⠀⠑⠢⢄⠀⠀⠀⠀⠀⠀
+⠨⡃⠀⢀⡴⡣⣗⢵⣣⢟⣟⣿⣿⣿⣎⡎⡎⡜⡐⢽⣾⡄⠀⠈⠑⢄⠀⠀⠀⠀
+⠀⢇⣠⢯⡪⣯⣺⢽⢾⣽⡽⣾⣺⣝⢿⣿⣼⢨⠢⡑⢿⣷⠀⠀⠀⠀⠳⡀⠀⠀
+⠀⡸⡪⡪⣿⣾⣺⡽⣿⣳⢯⡿⣵⢷⣝⢼⢻⣯⣎⠢⢹⣿⣇⠀⠀⠀⠀⠱⡀⠀
+⢰⡫⢪⢪⡘⠿⣿⣿⣿⣾⣯⣿⢽⡳⣕⢇⢗⢜⢻⣧⡡⣿⣿⡄⠀⠀⠀⠀⢣⠀    Welcome to
+⣞⢨⢊⢎⢆⠀⠀⠉⢿⣿⣿⣿⣿⣿⣷⣯⣮⣮⣦⣽⣿⣿⣿⣇⠀⠀⠀⠀⠈⡆
+⡧⢑⠔⡡⢣⠂⠀⠀⠀⢓⢝⢟⡻⡿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠀⠀⠀⠀⡇   [ S p a c e m a c s ]
+⡏⠄⠡⢊⢂⢅⠀⠀⠀⠀⠇⡇⠎⢎⠢⡩⠛⠻⢿⣿⣿⣿⣿⣿⡆⠀⠀⠀⢀⠇
+⢸⡀⡁⢁⠂⡂⠀⠀⠀⠀⠈⠔⡑⠡⢊⠐⡈⠌⢀⠀⠙⠻⢿⣿⣷⠀⠀⠀⡸⠀
+⠀⢣⠀⠀⠠⠈⠀⠀⠀⠀⠀⠀⠂⠌⠐⠠⠀⠀⠀⠀⠀⠀⠀⠈⠙⠀⠀⢠⠃⠀
+⠀⠀⢣⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠃⠀⠀
+⠀⠀⠀⠑⢄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠔⠁⠀⠀⠀
+⠀⠀⠀⠀⠀⠙⠤⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡠⠔⠁⠀⠀⠀⠀⠀
+ ⠀⠀⠀⠀⠀⠀⠀⠙⠒⠤⠤⣀⣀⣀⣀⣀⡠⠤⠔⠒⠉⠀⠀⠀⠀⠀⠀⠀⠀

core/banners/004-banner.txt

@@ -1,17 +1,17 @@
 
-       ⠀⠀⠀⣀⣀⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
-       ⠀⢀⠎⠁⠀⠀⠈⠉⠒⠦⢀⡀⡄⡤⡤⡤⡤⡤⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
-       ⠀⡎⡠⠒⠉⠉⢑⢲⢀⠀⠀⠈⠪⢣⢫⡺⣹⡹⣝⠾⣻⣶⣤⡀⠀⠀⠀⠀⠀⠀
-       ⠀⢿⡅⠀⠠⡰⡊⡎⡪⢊⠢⡠⢀⠀⠘⠜⣜⢎⡯⣳⠀⠳⣻⣿⣷⡄⠀⠀⠀⠀
-       ⠀⢹⣇⡠⠫⡪⡊⡢⢊⠨⠨⡂⢕⢐⠄⡀⠈⢺⢸⣝⡆⠀⢻⣷⣿⣿⣦⡀⠀⠀
-       ⠀⠈⣟⢪⢇⠀⠑⠌⠢⠡⡃⠢⡑⡐⢅⢇⢆⠀⠑⢕⣯⡀⠀⢿⣿⣿⣿⣷⡀⠀
-       ⠀⣐⢵⢣⢻⣦⣀⠀⠀⠁⠈⠌⠢⡊⡜⡔⡕⡭⢆⠈⠺⡄⠀⠸⣿⣿⣿⣿⣧⠀    Welcome to
-       ⠀⣵⡫⡮⡣⣿⣿⣿⣦⡀⠀⠀⠀⠀⠀⠈⠘⠘⠙⠑⠀⠀⠀⠀⢿⣿⣿⣿⣿⡀
-       ⠀⣗⡯⣞⢵⢽⣿⣿⣿⣟⡕⡕⡤⡠⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⣿⣿⣿⣿⡆   [ S p a c e m a c s ]
-       ⠀⣯⢿⣺⣝⢮⣿⣿⣿⣿⣿⡪⡮⣳⢝⡽⣲⢤⣄⡀⠀⠀⠀⠀⠈⣿⣿⣿⣿⠂
-       ⠀⢸⣿⡽⣾⣳⣻⣿⣿⣿⣿⣾⡽⣺⢵⡯⣯⣿⣳⡿⣷⣦⣄⠀⠀⢿⣿⣿⡟⠀
-       ⠀⠀⢺⣿⣯⣿⣽⣿⣿⣿⣿⣿⣿⣽⣯⣟⣿⣾⣿⣿⣿⣿⣿⣿⣶⣼⣿⡿⠁⠀
-       ⠀⠀⠀⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⠁⠀⠀
-       ⠀⠀⠀⠀⠘⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠋⠀⠀⠀⠀
-       ⠀⠀⠀⠀⠀⠀⠉⠻⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠟⠋⠀⠀⠀⠀⠀⠀
-       ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠛⠻⠻⠿⠿⠿⠛⠛⠉⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⣀⣀⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⢀⠎⠁⠀⠀⠈⠉⠒⠦⢀⡀⡄⡤⡤⡤⡤⡤⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⡎⡠⠒⠉⠉⢑⢲⢀⠀⠀⠈⠪⢣⢫⡺⣹⡹⣝⠾⣻⣶⣤⡀⠀⠀⠀⠀⠀⠀
+⠀⢿⡅⠀⠠⡰⡊⡎⡪⢊⠢⡠⢀⠀⠘⠜⣜⢎⡯⣳⠀⠳⣻⣿⣷⡄⠀⠀⠀⠀
+⠀⢹⣇⡠⠫⡪⡊⡢⢊⠨⠨⡂⢕⢐⠄⡀⠈⢺⢸⣝⡆⠀⢻⣷⣿⣿⣦⡀⠀⠀
+⠀⠈⣟⢪⢇⠀⠑⠌⠢⠡⡃⠢⡑⡐⢅⢇⢆⠀⠑⢕⣯⡀⠀⢿⣿⣿⣿⣷⡀⠀
+⠀⣐⢵⢣⢻⣦⣀⠀⠀⠁⠈⠌⠢⡊⡜⡔⡕⡭⢆⠈⠺⡄⠀⠸⣿⣿⣿⣿⣧⠀    Welcome to
+⠀⣵⡫⡮⡣⣿⣿⣿⣦⡀⠀⠀⠀⠀⠀⠈⠘⠘⠙⠑⠀⠀⠀⠀⢿⣿⣿⣿⣿⡀
+⠀⣗⡯⣞⢵⢽⣿⣿⣿⣟⡕⡕⡤⡠⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⣿⣿⣿⣿⡆   [ S p a c e m a c s ]
+⠀⣯⢿⣺⣝⢮⣿⣿⣿⣿⣿⡪⡮⣳⢝⡽⣲⢤⣄⡀⠀⠀⠀⠀⠈⣿⣿⣿⣿⠂
+⠀⢸⣿⡽⣾⣳⣻⣿⣿⣿⣿⣾⡽⣺⢵⡯⣯⣿⣳⡿⣷⣦⣄⠀⠀⢿⣿⣿⡟⠀
+⠀⠀⢺⣿⣯⣿⣽⣿⣿⣿⣿⣿⣿⣽⣯⣟⣿⣾⣿⣿⣿⣿⣿⣿⣶⣼⣿⡿⠁⠀
+⠀⠀⠀⠻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡟⠁⠀⠀
+⠀⠀⠀⠀⠘⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠋⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠉⠻⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠟⠋⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠉⠛⠻⠻⠿⠿⠿⠛⠛⠉⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀

core/core-spacemacs-buffer.el

@@ -71,6 +71,23 @@ version the release note it displayed")
   ;; motion state since this is a special mode
   (evil-set-initial-state 'spacemacs-buffer-mode 'motion))
 
+(defun spacemacs-buffer/insert-ascii-banner-centered (file)
+  (insert-string
+   (with-temp-buffer
+     (insert-file-contents file)
+     (let ((banner-width 0))
+       (while (not (eobp))
+	 (let ((line-length (- (line-end-position) (line-beginning-position))))
+	   (if (< banner-width line-length)
+	       (setq banner-width line-length)))
+	 (forward-line 1))
+       (goto-char 0)
+       (let ((margin (max 0 (floor (/ (- spacemacs-buffer--banner-length banner-width) 2)))))
+	 (while (not (eobp))
+	   (insert (make-string margin ?\ ))
+	   (forward-line 1))))
+     (buffer-string))))
+
 (defun spacemacs-buffer/insert-banner-and-buttons ()
   "Choose a banner according to `dotspacemacs-startup-banner'and insert it
 in spacemacs buffer along with quick buttons underneath.
@@ -86,7 +103,7 @@ Cate special text banner can de reachable via `998', `cat' or `random*'.
         (spacemacs-buffer/message (format "Banner: %s" banner))
         (if (image-type-available-p (intern (file-name-extension banner)))
             (spacemacs-buffer//insert-image-banner banner)
-          (insert-file-contents banner))
+          (spacemacs-buffer/insert-ascii-banner-centered banner))
         (spacemacs-buffer//inject-version))
       (spacemacs-buffer//insert-buttons)
       (unless (bound-and-true-p spacemacs-initialized)