From f2b428b4fe1eecd66ee95513da779470f7c621aa Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Wed, 31 Dec 2014 19:04:26 +0000
Subject: Modes proof-of-concept.

---
 lib/handler_stack.coffee | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'lib/handler_stack.coffee')

diff --git a/lib/handler_stack.coffee b/lib/handler_stack.coffee
index 858f2ec9..728ea4bc 100644
--- a/lib/handler_stack.coffee
+++ b/lib/handler_stack.coffee
@@ -5,6 +5,7 @@ class root.HandlerStack
   constructor: ->
     @stack = []
     @counter = 0
+    @passThrough = {}
 
   genId: -> @counter = ++@counter & 0xffff
 
@@ -18,6 +19,7 @@ class root.HandlerStack
   # propagation by returning a falsy value.
   bubbleEvent: (type, event) ->
     for i in [(@stack.length - 1)..0] by -1
+      console.log i, type
       handler = @stack[i]
       # We need to check for existence of handler because the last function call may have caused the release
       # of more than one handler.
@@ -27,6 +29,10 @@ class root.HandlerStack
         if not passThrough
           DomUtils.suppressEvent(event)
           return false
+        # If @passThrough is returned, then discontinue further bubbling and pass the event through to the
+        # underlying page.  The event is not suppresssed.
+        if passThrough == @passThrough
+          return false
     true
 
   remove: (id = @currentId) ->
@@ -35,3 +41,5 @@ class root.HandlerStack
       if handler.id == id
         @stack.splice(i, 1)
         break
+
+root.handlerStack = new HandlerStack
-- 
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