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Document changes with remapping

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Lars Tveito 2020-02-23 16:20:12 +01:00
parent 933490c059
commit 83355a4f1c
1 changed files with 25 additions and 12 deletions
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37
focus.el
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@ -91,13 +91,17 @@ Things that are defined include `symbol', `list', `sexp',
(defvar-local focus-post-overlay nil
"The overlay that dims the text past the current-point.")
(defvar-local focus-mid-overlays nil)
(defvar-local focus-mid-overlays nil
"These overlays restore original colors in the focused area.")
(defvar-local focus-remap-cookies nil)
(defvar-local focus-remap-cookies nil
"A list of cookies used for deleting the face remapping.")
(defvar-local focus-last-bounds nil)
(defvar-local focus-last-bounds nil
"Used to identify changes in `focus-bounds'.")
(defvar-local focus-last-background nil)
(defvar-local focus-last-background nil
"Used to identify changes in the background.")
(defvar-local focus-read-only-blink-timer nil
"Timer started from `focus-read-only-cursor-blink'.
@ -105,10 +109,12 @@ The timer calls `focus-read-only-hide-cursor' after
`focus-read-only-blink-seconds' seconds.")
(defun focus-lerp (c1 c2 d)
"Interpolate C1 with C2, where D controls the amount."
(apply 'color-rgb-to-hex
(cl-mapcar (lambda (x y) (+ (* x (- 1 d)) (* y d))) c1 c2)))
(defun focus-remap-foreground-color-from-face (face)
"Remap the foreground color of FACE to a dimmed color."
(let ((fg (face-foreground face))
(bg (face-background 'default)))
(when (and fg bg (color-defined-p fg) (color-defined-p bg))
@ -118,24 +124,32 @@ The timer calls `focus-read-only-hide-cursor' after
(cookie (face-remap-add-relative face `(:foreground ,new-fg))))
(push cookie focus-remap-cookies)))))
(defun focus-reset-remapping ()
"Clean up remappings stored in `focus-remap-cookies'."
(while focus-remap-cookies
(face-remap-remove-relative
(pop focus-remap-cookies))))
(defun focus-dim-buffer ()
"Dim the colors of relevant faces in the buffer."
;; Most faces that alters the background are better left undimmed. The
;; default face is, however, a clear exception.
(focus-reset-remapping)
(focus-remap-foreground-color-from-face 'default)
(dolist (face (face-list))
(when (and (not (face-background face))
(face-foreground face))
(focus-remap-foreground-color-from-face face))))
(defun focus-reset-remapping ()
(while focus-remap-cookies
(face-remap-remove-relative
(pop focus-remap-cookies))))
(defun focus-make-focused-face (fg)
"Add original foreground color FG to the `focus-focused` face."
(plist-put (face-attr-construct 'focus-focused) :foreground fg))
(defun focus-undim-area (low high)
"Restore original colors in focused area.
The number of overlays created is proportional to how many times
the foreground color changes between LOW and HIGH."
(mapc 'delete-overlay focus-mid-overlays)
(setq focus-mid-overlays nil)
(save-excursion
@ -179,9 +193,8 @@ command."
(bg (face-background 'default)))
(when (not (equal focus-last-background bg))
(focus-dim-buffer))
(when (and bounds
(or (not (equal bg focus-last-background))
(not (equal bounds focus-last-bounds))))
(when (and bounds (or (not (equal bg focus-last-background))
(not (equal bounds focus-last-bounds))))
(let ((low (car bounds))
(high (cdr bounds)))
(focus-move-overlays low high)