EMACS: Markdown settings

Load markdown-mode for .mdwn files, don't remove whitespace when
markdown-mode is active and enable whitespace-mode and auto-fill-mode
for markdown-mode.

3 files changed, 36 insertions, 20 deletions

diff --git a/emacs.d/10-file-associations.el b/emacs.d/10-file-associations.el
index 52a7e23..b82e0e3 100644
--- a/emacs.d/10-file-associations.el
+++ b/emacs.d/10-file-associations.el
@@ -5,6 +5,8 @@
 (add-to-list 'auto-mode-alist '("\\.lua$" . lua-mode))
 (add-to-list 'auto-mode-alist '("\\.php[345]?$" . php-mode))
 (add-to-list 'auto-mode-alist '("\\.js\\(on\\)?$" . javascript-mode))
+(add-to-list 'auto-mode-alist '("\\.mdwn$" . markdown-mode))
+(add-to-list 'auto-mode-alist '("\\.markdown$" . markdown-mode))
 
 (add-to-list 'file-coding-system-alist '("\\.vala$" . utf-8))
 (add-to-list 'file-coding-system-alist '("\\.vapi$" . utf-8))
diff --git a/emacs.d/10-settings.el b/emacs.d/10-settings.el
index d5ede72..b7e3f85 100644
--- a/emacs.d/10-settings.el
+++ b/emacs.d/10-settings.el
@@ -1,32 +1,44 @@
 (add-to-list 'default-frame-alist '(font . "DejaVu Sans Mono-10:antialias=true"))
 
-(setq inhibit-startup-message      t)   ; don't show welcome screen
-(setq require-final-newline        t)   ; always append a newline to a
-					; file, if it doesn't have one
+(setq inhibit-startup-message t)        ; don't show welcome screen
+(setq require-final-newline t)          ; always append a newline to a
+					;   file, if it doesn't have one
 (setq font-lock-maximum-decoration t)   ; denotes my interest in maximum
-					; possible fontification
-(setq inhibit-default-init         t)   ; don't load default init
-(setq-default indent-tabs-mode     nil) ; spaces, no tabs
+					;   possible fontification
+(setq inhibit-default-init t)           ; don't load default init
+(setq-default indent-tabs-mode nil)     ; spaces, no tabs
+(setq scroll-conservatively 10000)      ; scroll only one line
+(setq whitespace-style '(face trailing))
 
-(setq backup-directory-alist `((".*" . ,temporary-file-directory)))
-                                        ; backup file location
-(setq auto-save-file-name-transforms `((".*" ,temporary-file-directory t)))
-                                        ; autosave file location
+(setq backup-directory-alist            ; backup file location
+      `((".*" .
+         ,temporary-file-directory)))
+(setq auto-save-file-name-transforms    ; autosave file location
+      `((".*" ,temporary-file-directory
+         t)))
 
 (fset 'yes-or-no-p 'y-or-n-p)           ; switch yes or no to y or n
 
-(tool-bar-mode         -1)              ; no toolbar
-(menu-bar-mode         -1)              ; no menubar
-(scroll-bar-mode       -1)              ; no scrollbars
-(line-number-mode      -1)              ; don't show line number in splitter
-(global-linum-mode     t)               ; show them in the gutter
-(column-number-mode    t)               ; show column number in splitter
+(tool-bar-mode -1)                      ; no toolbar
+(menu-bar-mode -1)                      ; no menubar
+(scroll-bar-mode -1)                    ; no scrollbars
+(line-number-mode -1)                   ; don't show line number in
+                                        ;   splitter
+(global-linum-mode t)                   ; show them in the gutter
+(column-number-mode t)                  ; show column number in splitter
 (global-font-lock-mode t)               ; show syntax highlighting, old
 (delete-selection-mode t)               ; delete selection upon typing
-(show-paren-mode       t)
+(show-paren-mode t)                     ; show the opposite paren
+
+(defun buffer-major-mode (buffer-or-string)
+  (with-current-buffer buffer-or-string major-mode))
 
 ;; Byte-compile elisp files on save
-(add-hook 'before-save-hook 'delete-trailing-whitespace)
+(add-hook 'before-save-hook
+          (lambda ()
+            (if (not (eq (buffer-major-mode (current-buffer))
+                        'markdown-mode))
+                (delete-trailing-whitespace))))
 (add-hook 'after-save-hook
           (lambda ()
             (let ((fname (buffer-file-name)))
diff --git a/emacs.d/20-markdown-mode.el b/emacs.d/20-markdown-mode.el
index c187307..9058bb2 100644
--- a/emacs.d/20-markdown-mode.el
+++ b/emacs.d/20-markdown-mode.el
@@ -1,4 +1,6 @@
 (autoload 'markdown-mode "markdown-mode"
   "Major mode for editing Markdown files" t)
-(setq auto-mode-alist
-      (cons '("\\.markdown" . markdown-mode) auto-mode-alist))
+
+(add-hook 'markdown-mode-hook (lambda ()
+                                (whitespace-mode)
+                                (auto-fill-mode)))