Blink cursors always. Still need to pause blinking when moving.

spec/editor-component-spec.coffee

@@ -117,6 +117,24 @@ describe "EditorComponent", ->
       expect(cursorRect.left).toBe rangeRect.left
       expect(cursorRect.width).toBe rangeRect.width
 
+    it "blinks cursors", ->
+      editor.addCursorAtScreenPosition([1, 0])
+      [cursorNode1, cursorNode2] = node.querySelectorAll('.cursor')
+      expect(cursorNode1.classList.contains('blink-off')).toBe false
+      expect(cursorNode2.classList.contains('blink-off')).toBe false
+
+      advanceClock(component.props.cursorBlinkPeriod / 2)
+      expect(cursorNode1.classList.contains('blink-off')).toBe true
+      expect(cursorNode2.classList.contains('blink-off')).toBe true
+
+      advanceClock(component.props.cursorBlinkPeriod / 2)
+      expect(cursorNode1.classList.contains('blink-off')).toBe false
+      expect(cursorNode2.classList.contains('blink-off')).toBe false
+
+      advanceClock(component.props.cursorBlinkPeriod / 2)
+      expect(cursorNode1.classList.contains('blink-off')).toBe true
+      expect(cursorNode2.classList.contains('blink-off')).toBe true
+
   describe "selection rendering", ->
     it "renders 1 region for 1-line selections", ->
       # 1-line selection

spec/spec-helper.coffee

@@ -92,6 +92,8 @@ beforeEach ->
   spyOn(WorkspaceView.prototype, 'setTitle').andCallFake (@title) ->
   spyOn(window, "setTimeout").andCallFake window.fakeSetTimeout
   spyOn(window, "clearTimeout").andCallFake window.fakeClearTimeout
+  spyOn(window, "setInterval").andCallFake window.fakeSetInterval
+  spyOn(window, "clearInterval").andCallFake window.fakeClearInterval
   spyOn(pathwatcher.File.prototype, "detectResurrectionAfterDelay").andCallFake -> @detectResurrection()
   spyOn(Editor.prototype, "shouldPromptToSave").andReturn false
 
@@ -243,6 +245,15 @@ window.fakeSetTimeout = (callback, ms) ->
 window.fakeClearTimeout = (idToClear) ->
   window.timeouts = window.timeouts.filter ([id]) -> id != idToClear
 
+window.fakeSetInterval = (callback, ms) ->
+  action = ->
+    callback()
+    window.fakeSetTimeout(action, ms)
+  window.fakeSetTimeout(action, ms)
+
+window.fakeClearInterval = (idToClear) ->
+  window.fakeClearTimeout(idToClear)
+
 window.advanceClock = (delta=1) ->
   window.now += delta
   callbacks = []

src/cursor-component.coffee

@@ -8,7 +8,10 @@ CursorComponent = React.createClass
 
   render: ->
     {top, left, height, width} = @props.cursor.getPixelRect()
-    div className: 'cursor', style: {top, left, height, width}
+    className = 'cursor'
+    className += ' blink-off' if @props.blinkOff
+
+    div className: className, style: {top, left, height, width}
 
   componentDidMount: ->
     @subscribe @props.cursor, 'moved', => @forceUpdate()

src/editor-component.coffee

@@ -63,9 +63,10 @@ EditorCompont = React.createClass
 
   renderCursors: ->
     {editor} = @props
+    {blinkCursorsOff} = @state
 
     for selection in editor.getSelections() when editor.selectionIntersectsVisibleRowRange(selection)
-      CursorComponent(cursor: selection.cursor)
+      CursorComponent(cursor: selection.cursor, blinkOff: blinkCursorsOff)
 
   renderUnderlayer: ->
     {editor} = @props
@@ -83,7 +84,7 @@ EditorCompont = React.createClass
 
   getInitialState: -> {}
 
-  getDefaultProps: -> updateSync: true
+  getDefaultProps: -> cursorBlinkPeriod: 800
 
   componentDidMount: ->
     @measuredLines = new WeakSet
@@ -92,12 +93,14 @@ EditorCompont = React.createClass
     @listenForCustomEvents()
     @observeEditor()
     @observeConfig()
+    @blinkCursors()
 
     @updateAllDimensions()
     @props.editor.setVisible(true)
 
   componentWillUnmount: ->
     @getDOMNode().removeEventListener 'mousewheel', @onMouseWheel
+    clearInterval(@cursorBlinkIntervalHandle)
 
   componentDidUpdate: ->
     @updateVerticalScrollbar()
@@ -233,6 +236,11 @@ EditorCompont = React.createClass
   observeConfig: ->
     @subscribe atom.config.observe 'editor.fontFamily', @setFontFamily
 
+  blinkCursors: ->
+    @cursorBlinkIntervalHandle = setInterval(@toggleCursorBlink, @props.cursorBlinkPeriod / 2)
+
+  toggleCursorBlink: -> @setState(blinkCursorsOff: not @state.blinkCursorsOff)
+
   setFontSize: (fontSize) ->
     @clearScopedCharWidths()
     @setState({fontSize})