Text is selected when mouse is moved after double click

spec/atom/editor-spec.coffee

@@ -385,6 +385,37 @@ describe "Editor", ->
         expect(range.end).toEqual({row: 5, column: 27})
         expect(editor.getCursorPosition()).toEqual(row: 5, column: 27)
 
+      fit "creates a selection from the initial double click to mouse cursor's location ", ->
+        editor.attachToDom()
+        editor.css(position: 'absolute', top: 10, left: 10)
+
+        # double click
+        [pageX, pageY] = window.pixelPositionForPoint(editor, [4, 10])
+        editor.lines.trigger mousedownEvent({pageX, pageY, originalEvent: {detail: 1}})
+        $(document).trigger 'mouseup'
+        editor.lines.trigger mousedownEvent({pageX, pageY, originalEvent: {detail: 2}})
+
+        # moving changes selection
+        [pageX, pageY] = window.pixelPositionForPoint(editor, [5, 27])
+        editor.lines.trigger mousemoveEvent({pageX, pageY})
+
+        range = editor.selection.getRange()
+        expect(range.start).toEqual({row: 4, column: 10})
+        expect(range.end).toEqual({row: 5, column: 27})
+        expect(editor.getCursorPosition()).toEqual(row: 5, column: 27)
+
+        # mouse up may occur outside of editor, but still need to halt selection
+        $(document).trigger 'mouseup'
+
+        # moving after mouse up should not change selection
+        [pageX, pageY] = window.pixelPositionForPoint(editor, [8, 8])
+        editor.lines.trigger mousemoveEvent({pageX, pageY})
+
+        range = editor.selection.getRange()
+        expect(range.start).toEqual({row: 4, column: 10})
+        expect(range.end).toEqual({row: 5, column: 27})
+        expect(editor.getCursorPosition()).toEqual(row: 5, column: 27)
+
   describe "buffer manipulation", ->
     describe "when text input events are triggered on the hidden input element", ->
       describe "when there is no selection", ->

src/atom/editor.coffee

@@ -83,11 +83,10 @@ class Editor extends Template
 
         if clickCount == 1
           @setCursorPosition @pointFromMouseEvent(e)
-          moveHandler = (e) => @selectToPosition(@pointFromMouseEvent(e))
-          @on 'mousemove', moveHandler
-          $(document).one 'mouseup', => @off 'mousemove', moveHandler
+          @selectTextOnMouseMovement()
         else if clickCount == 2
           @selection.selectWord()
+          @selectTextOnMouseMovement()
 
       @hiddenInput.on "textInput", (e) =>
         @insertText(e.originalEvent.data)
@@ -100,6 +99,12 @@ class Editor extends Template
         @hiddenInput.width(@charWidth)
         @focus()
 
+    selectTextOnMouseMovement: ->
+      moveHandler = (e) => @selectToPosition(@pointFromMouseEvent(e))
+      @on 'mousemove', moveHandler
+      $(document).one 'mouseup', => @off 'mousemove', moveHandler
+
+
     buildLineElement: (row) ->
       tokens = @highlighter.tokensForRow(row)
       $$.pre class: 'line', ->