Function: pulse-momentary-highlight-overlay

pulse-momentary-highlight-overlay is a byte-compiled function defined in pulse.el.gz.

Signature

(pulse-momentary-highlight-overlay O &optional FACE)

Documentation

Pulse the overlay O, unhighlighting before next command.

Optional argument FACE specifies the face to do the highlighting.

Source Code

;; Defined in /usr/src/emacs/lisp/cedet/pulse.el.gz
(defun pulse-momentary-highlight-overlay (o &optional face)
  "Pulse the overlay O, unhighlighting before next command.
Optional argument FACE specifies the face to do the highlighting."
  ;; We don't support simultaneous highlightings.
  (pulse-momentary-unhighlight)
  (overlay-put o 'original-face (overlay-get o 'face))
  ;; Make this overlay take priority over the `transient-mark-mode'
  ;; overlay.
  (overlay-put o 'original-priority (overlay-get o 'priority))
  (overlay-put o 'priority 1)
  (setq pulse-momentary-overlay o)
  (if (eq pulse-flag 'never)
      nil
    (if (or (not pulse-flag) (not (pulse-available-p)))
	;; Provide a face... clear on next command
	(progn
	  (overlay-put o 'face (or face 'pulse-highlight-start-face))
	  (add-hook 'pre-command-hook
		    #'pulse-momentary-unhighlight))
      ;; Pulse it.
      (overlay-put o 'face 'pulse-highlight-face)
      ;; The pulse function puts FACE onto 'pulse-highlight-face.
      ;; Thus above we put our face on the overlay, but pulse
      ;; with a reference face needed for the color.
      (pulse-reset-face face)
      (let* ((start (color-name-to-rgb
                     (face-background 'pulse-highlight-face nil 'default)))
             (stop (color-name-to-rgb (face-background 'default)))
             (colors (mapcar (apply-partially 'apply 'color-rgb-to-hex)
                             (color-gradient start stop pulse-iterations))))
        (setq pulse-momentary-timer
              (run-with-timer 0 pulse-delay #'pulse-tick
                              colors
                              (time-add nil
                                        (* pulse-delay pulse-iterations))))))))