Modes; more changes...

- Simplify InsertMode Trigger/Blocker (yet again).
- Reduce badge flicker for singletons.

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/utils.coffee b/lib/utils.coffee
index 661f7e84..a7bfc440 100644
--- a/lib/utils.coffee
+++ b/lib/utils.coffee
@@ -152,6 +152,24 @@ Utils =
   # locale-sensitive uppercase detection
   hasUpperCase: (s) -> s.toLowerCase() != s
 
+  # Utility class.  This can help different software components to interact without having to share much logic
+  # and/or state.  See InsertModeTrigger for an example.
+  # suppressedResult is the value to be returned when a function call is suppressed.
+  Suppressor: class Suppressor
+    constructor: (@suppressedResult = null)->
+      @count = 0
+
+    suppress: -> @count += 1
+    unsuppress: -> @count -= 1
+
+    runSuppresed: (func) ->
+      @suppress()
+      func()
+      @unsuppress()
+
+    unlessSuppressed: (func) ->
+      if 0 < @count then @suppressedResult else func()
+
 # 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 = ->