From c4735264f46fdc62020c81bd8ff6f67ebd1dad9a Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Wed, 21 Jan 2015 19:35:24 +0000
Subject: Edit mode: first working visual mode.

---
 lib/utils.coffee | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'lib/utils.coffee')

diff --git a/lib/utils.coffee b/lib/utils.coffee
index 661f7e84..f8eb5457 100644
--- a/lib/utils.coffee
+++ b/lib/utils.coffee
@@ -152,6 +152,20 @@ Utils =
   # locale-sensitive uppercase detection
   hasUpperCase: (s) -> s.toLowerCase() != s
 
+  # Allow a function call to be suppressed.  Use Utils.suppress.unlessSuppressed to call a function, unless it
+  # is suppressed via the given key.  Use Utils.suppressor.suppress to call a function while suppressing the
+  # given key.
+  suppressor: do ->
+    suppressed = {}
+
+    suppress: (key, func) ->
+      suppressed[key] = if suppressed[key]? then suppressed[key] + 1 else 1
+      func()
+      suppressed[key] -= 1
+
+    unlessSuppressed: (key, func) ->
+      func() unless suppressed[key]? and 0 < suppressed[key]
+
 # This creates a new function out of an existing function, where the new function takes fewer arguments. This
 # allows us to pass around functions instead of functions + a partial list of arguments.
 Function::curry = ->
-- 
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