From 681c61d37f0b937939e739d888e93c65add51463 Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Sat, 22 Apr 2017 07:37:57 +0100
Subject: Firefox: Polyfill for selection.type for visual mode.

@mrmr1993... This puts the logic of how we choose the selection type in
one place; so, if you have a better idea of how to determine the
selection type, then we just change it here.  Once.
---
 lib/dom_utils.coffee | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'lib')

diff --git a/lib/dom_utils.coffee b/lib/dom_utils.coffee
index 8fdc319e..c21d5a29 100644
--- a/lib/dom_utils.coffee
+++ b/lib/dom_utils.coffee
@@ -326,9 +326,15 @@ DomUtils =
       @suppressEvent event
       handlerStack.suppressEvent
 
-
+  # Polyfill for selection.type (which is not available in Firefox).
   getSelectionType: (selection) ->
-    selection.type
+    selection.type or do ->
+      if selection.rangeCount == 0
+        "None"
+      else if selection.isCollapsed
+        "Caret"
+      else
+        "Range"
 
   # Adapted from: http://roysharon.com/blog/37.
   # This finds the element containing the selection focus.
-- 
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