Update Tokenized/DisplayBuffer prior to TextBuffer::onDidChange handlers

Fixes #3789

package.json

@@ -58,7 +58,7 @@
     "serializable": "^1",
     "space-pen": "3.8.0",
     "temp": "0.7.0",
-    "text-buffer": "^3.2.10",
+    "text-buffer": "^3.3.0",
     "theorist": "^1.0.2",
     "underscore-plus": "^1.6.1",
     "vm-compatibility-layer": "0.1.0"

spec/display-buffer-spec.coffee

@@ -56,6 +56,11 @@ describe "DisplayBuffer", ->
       buffer.delete([[8, 0], [10, 0]])
       expect(displayBuffer.getScrollTop()).toBe 60
 
+    it "updates the display buffer prior to invoking change handlers registered on the buffer", ->
+      buffer.onDidChange -> expect(displayBuffer2.tokenizedLineForScreenRow(0).text).toBe "testing"
+      displayBuffer2 = new DisplayBuffer({buffer, tabLength})
+      buffer.setText("testing")
+
   describe "soft wrapping", ->
     beforeEach ->
       displayBuffer.setSoftWrapped(true)

src/tokenized-buffer.coffee

@@ -29,7 +29,7 @@ class TokenizedBuffer extends Model
     @subscribe atom.syntax.onDidAddGrammar(@grammarAddedOrUpdated)
     @subscribe atom.syntax.onDidUpdateGrammar(@grammarAddedOrUpdated)
 
-    @subscribe @buffer.onDidChange (e) => @handleBufferChange(e)
+    @subscribe @buffer.preemptDidChange (e) => @handleBufferChange(e)
     @subscribe @buffer.onDidChangePath (@bufferPath) => @reloadGrammar()
 
     @reloadGrammar()