[nongnu] elpa/evil-goggles fc62425d64 001/225: Initial version for evil-delete only

[ELPA Syncer]

branch: elpa/evil-goggles
commit fc62425d6422853b34c0d2be90a2dd70758c944b
Author: Evgeni Kolev <evgenysw@gmail.com>
Commit: Evgeni Kolev <evgenysw@gmail.com>

    Initial version for evil-delete only
---
 evil-goggles.el | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/evil-goggles.el b/evil-goggles.el
new file mode 100644
index 0000000000..73d45708b3
--- /dev/null
+++ b/evil-goggles.el
@@ -0,0 +1,69 @@
+;; goals:
+;; - delete with strikethrough preview
+;; - yank with 'region' previw
+;; - indent with 'underline' preview
+;; next goals:
+;; - one (advice) for all cases
+;; - make the above configurable
+;; next goals:
+;; -  configurable integration with plugins: evil-surround, evil-lion
+;; - '.' repeat with goggles
+
+;; implementation:
+;; - advise evil-delete, after
+;; - if (and called interactively, not visual state, not insert state, goggles 
off, more than one char in region)
+;;   - set goggles on
+;;   - show goggles
+;;   - call orig-fun
+;;   - set gogges off
+;; - else
+;;   - call (interactively?) orig-fun
+
+(defvar evil-goggles--on nil)
+(defvar evil-goggles-show-for 0.200) ;; .100 or .200 seem best
+
+(defun evil-goggles--show (beg end)
+  (let ((ov (evil-goggles--make-overlay beg end 'face 'region)))
+    (sit-for evil-goggles-show-for)
+    (delete-overlay ov)))
+
+(defun evil-goggles--make-overlay (beg end &rest properties)
+  (let ((ov (make-overlay beg end)))
+    (overlay-put ov 'priority 9999)
+    (overlay-put ov 'window (selected-window))
+    (while properties
+      (overlay-put ov (pop properties) (pop properties)))
+    ov))
+
+(defun evil-goggles--show-p (beg end)
+  (and (not evil-goggles--on)
+       (numberp beg)
+       (numberp end)
+       (> (- end beg) 1)
+       (<= (point-min) beg end)
+       (>= (point-max) end beg)
+       (not (evil-visual-state-p))
+       (not (evil-insert-state-p))))
+
+(defun evil-goggles--evil-delete-advice (orig-fun &rest args)
+  (let ((beg (nth 0 args))
+        (end (nth 1 args)))
+    (if (evil-goggles--show-p beg end)
+        (let* ((evil-goggles--on t))
+          (evil-goggles--show beg end)
+          (apply orig-fun args))
+      (apply orig-fun args))))
+
+(define-minor-mode evil-goggles-mode
+  "evil-goggles global minor mode."
+  :lighter " (⌐■-■)"
+  :global t
+  (cond
+   (evil-goggles-mode
+    (advice-add 'evil-delete :around 'evil-goggles--evil-delete-advice))
+   (t
+    (advice-remove 'evil-delete 'evil-goggles--evil-delete-advice))))
+
+(provide 'evil-goggles)
+
+;; evil-goggles.el end here