Pass hasAstral() through to the native buffer

Author: smashwilson

spec/text-buffer-spec.coffee

@@ -2609,6 +2609,13 @@ describe "TextBuffer", ->
       buffer.setText('\n')
       expect(buffer.isEmpty()).toBeFalsy()
 
+  describe "::hasAstral()", ->
+    it "returns true for buffers containing surrogate pairs", ->
+      expect(new TextBuffer('hooray 😄').hasAstral()).toBeTruthy()
+
+    it "returns false for buffers that do not contain surrogate pairs", ->
+      expect(new TextBuffer('nope').hasAstral()).toBeFalsy()
+
   describe "::onWillChange(callback)", ->
     it "notifies observers before a transaction, an undo or a redo", ->
       changeCount = 0

src/text-buffer.coffee

@@ -728,6 +728,12 @@ class TextBuffer
         return row unless @isRowBlank(row)
     null
 
+  # Extended: Return true if the buffer contains any astral-plane Unicode characters that
+  # are encoded as surrogate pairs.
+  #
+  # Returns a {Boolean}.
+  hasAstral: -> @buffer.hasAstral()
+
   ###
   Section: Mutating Text
   ###