mirror of
https://github.com/larstvei/Focus.git
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35 lines
1.4 KiB
EmacsLisp
35 lines
1.4 KiB
EmacsLisp
(defvar-local focus-pre-overlay nil)
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(defvar-local focus-post-overlay nil)
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(defun focus-hexstr-to-int (str)
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(read (concat "#x" (substring str 1))))
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(defun focus-average-colors (hstr1 hstr2 &rest hstrs)
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(let* ((strs (cons hstr1 (cons hstr2 hstrs)))
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(avg (/ (apply '+ (mapcar 'focus-hexstr-to-int strs)) 2)))
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(format "#%X" avg)))
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(defun focus-move-focus ()
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(save-excursion
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(let* ((pre (or (re-search-backward "^\n" nil t) 1))
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(post (1- (or (re-search-forward "^\n" nil t 2)
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(1+ (point-max))))))
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(move-overlay focus-pre-overlay (point-min) pre)
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(move-overlay focus-post-overlay post (point-max)))))
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;;;###autoload
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(define-minor-mode focus-mode
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"Dim the font color text in surrounding paragraphs."
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:init-value nil
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(if (not focus-mode)
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(progn (mapc 'delete-overlay (list focus-pre-overlay focus-post-overlay))
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(remove-hook 'post-command-hook 'focus-move-focus t))
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(setq focus-pre-overlay (make-overlay (point-min) (point-min))
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focus-post-overlay (make-overlay (point-max) (point-max)))
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(let ((color (focus-average-colors
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(face-attribute 'default :foreground)
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(face-attribute 'default :background))))
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(mapc (lambda (o) (overlay-put o 'face (cons 'foreground-color color)))
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(list focus-pre-overlay focus-post-overlay)))
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(add-hook 'post-command-hook 'focus-move-focus nil t)))
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