Re: fringe symbol for newline

[David Reitter]

On 9 Jul 2008, at 23:06, Miles Bader wrote:

> David Reitter <address@hidden> writes:
> > Now that we have improved wrapping to support DTWW, it would be  
> > nice if
> > the fringe could mark visual lines that end with a newline.
>
> Note that you can rather easily cause a special symbol (e.g. ¶, ↲,  
> or
> what-have-you) to be displayed before newlines, using the display- 
> table.
>
> That seems to be what most other apps do anyway (rather than putting
> something "in the fringe")?

Right, and they also don't have fringes (at least not used for similar  
purposes).

That said, below is some code that does this for me (put together from  
code by Drew Adams and whitespace.el).
It's not simple enough for your average user to do this, and since  
it's a standard function in other editors, I would like to see this as  
a simple-to-enable standard function in 23, possibly even with an  
entry in the Options menu.  (I couldn't make whitespace (in 22) do the  
same.)

Also, I'd still prefer this to be in the fringe. It's a lot less  
intrusive.  You need this sort of information only occasionally.


(defface blank-newline
  '((((class color) (background dark))
     (:foreground "lightgrey" :bold t))
    (((class color) (background light))
     ( :foreground "lightgrey" :bold t))
    (t (:bold t :underline t)))
  "Face used to visualize NEWLINE char mapping.

See `blank-display-mappings'."
  :group 'blank)

;; 2230 = \x8B6
(setq buffer-display-table (make-display-table))
(aset buffer-display-table 10 (vector  32 (make-glyph-code  2230
                                                 'blank-newline) 10))

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