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Improve font adjustment

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Ivan Malison 2016-09-12 15:33:09 -07:00
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dotfiles/emacs.d/README.org
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@ -570,7 +570,7 @@ the ~:around~ keyword of advice-add.
** Font Size
This was taken from [[http://emacs.stackexchange.com/questions/7583/transiently-adjust-text-size-in-mode-line-and-minibuffer][here]]. It is primarily invoked from a hydra defined below. It would be cool if it got the default font size from whatever the default font was but it does not currently do that.
#+BEGIN_SRC emacs-lisp
(setq imalison:default-font-size-pt 14)
(setq imalison:default-font-size-pt 100)
(defun imalison:font-size-adj (&optional arg)
"The default C-x C-0/-/= bindings do an excellent job of font resizing.
@ -581,16 +581,18 @@ This was taken from [[http://emacs.stackexchange.com/questions/7583/transiently-
decreases font size by NUM points if NUM is -ve
resets font size if NUM is 0."
(interactive "p")
(if (= arg 0)
(setq font-size-pt imalison:default-font-size-pt)
(setq font-size-pt (+ font-size-pt arg)))
;; The internal font size value is 10x the font size in points unit.
;; So a 10pt font size is equal to 100 in internal font size value.
(set-face-attribute 'default nil :height (* font-size-pt 10)))
(let ((current-height
(plist-get (custom-face-attributes-get 'default nil) :height)))
(set-face-attribute 'default nil :height
(+ current-height arg))))
(defun imalison:font-size-incr () (interactive) (imalison:font-size-adj +1))
(defun imalison:font-size-decr () (interactive) (imalison:font-size-adj -1))
(defun imalison:font-size-reset () (interactive) (imalison:font-size-adj 0))
(defun imalison:font-size-incr () (interactive) (imalison:font-size-adj +10))
(defun imalison:font-size-decr () (interactive) (imalison:font-size-adj -10))
(defun imalison:font-size-reset () (interactive)
(set-face-attribute 'default nil
:height imalison:default-font-size-pt))
#+END_SRC
** Message Result Builder
This macro is useful when writing emacs-lisp. It creates a new interactive command that shows you the result of evaluating a function, with optionally provided arguments.