From 9f3a3bd2793955083a394d2e527209bc273e0d57 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=C3=93scar=20Fuentes?= <oscarfv@telefonica.net>
Date: Tue, 24 Jun 2014 01:45:50 +0200
Subject: [PATCH] Increases/decreases wpm on the fly

Adds keybindings `f' and `s' for faster/slower wpm rate.
---
 Readme.org |  6 ++++++
 spray.el   | 28 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/Readme.org b/Readme.org
index 5e379c1..9f30145 100644
--- a/Readme.org
+++ b/Readme.org
@@ -35,6 +35,12 @@ In spray-mode buffers, following commands are available.
 - =spray-forward-word= (l, <right>) ::
      inverse of =spray-backward-word=
 
+- =spray-faster= (f) ::
+     increases speed
+
+- =spray-slower= (s) ::
+     decreases speed
+
 Press any key else to quit =spray-mode=.
 
 ** Customization
diff --git a/spray.el b/spray.el
index aab9f8e..48819cb 100644
--- a/spray.el
+++ b/spray.el
@@ -54,6 +54,8 @@
     (define-key km (kbd "l") 'spray-forward-word)
     (define-key km (kbd "<left>") 'spray-backward-word)
     (define-key km (kbd "<right>") 'spray-forward-word)
+    (define-key km (kbd "f") 'spray-faster)
+    (define-key km (kbd "s") 'spray-slower)
     km)
   "keymap for spray-mode buffers")
 
@@ -198,6 +200,32 @@ an integer or a float value."
   (skip-chars-backward "\s\t\n")
   (spray--word-at-point))
 
+(defun spray-faster ()
+  "Increases speed.
+
+Increases the wpm (words per minute) parameter. See the variable
+`spray-wmp'."
+  (interactive)
+  (spray-inc-wpm 20))
+
+(defun spray-slower ()
+  "Decreases speed.
+
+Decreases the wpm (words per minute) parameter. See the variable
+`spray-wmp'."
+  (interactive)
+  (spray-inc-wpm -20))
+
+(defun spray-inc-wpm (delta)
+  (let ((was-running spray--running))
+    (spray-start/stop -1)
+    (when (< 10 (+ spray-wpm delta))
+      (setq spray-wpm (+ spray-wpm delta)))
+    (spray-backward-word)
+    (message "spray wpm: %d" spray-wpm)
+    (when was-running
+      (spray-start/stop 1))))
+
 ;; * provide
 
 (provide 'spray)
-- 
2.30.2