Sync multiple cursor animations

src/app/cursor.coffee

@@ -16,7 +16,9 @@ class Cursor extends View
     @editor = editor
     @anchor = new Anchor(@editor, screenPosition)
     @selection = @editor.compositeSelection.addSelectionForCursor(this)
-    @one 'attach', => @updateAppearance()
+    @one 'attach', =>
+      @updateAppearance()
+      @editor.syncCursorAnimations()
 
   handleBufferChange: (e) ->
     @anchor.handleBufferChange(e)
@@ -52,6 +54,11 @@ class Cursor extends View
     window.clearTimeout(@idleTimeout) if @idleTimeout
     @idleTimeout = window.setTimeout (=> @addClass 'idle'), 200
 
+  resetCursorAnimation: ->
+    window.clearTimeout(@idleTimeout) if @idleTimeout
+    @removeClass 'idle'
+    _.defer => @addClass 'idle'
+
   clearSelection: ->
     @selection.clearSelection() unless @selection.retainSelection
 

src/app/editor.coffee

@@ -186,6 +186,7 @@ class Editor extends View
       @off 'mousemove', moveHandler
       reverse = @compositeSelection.getLastSelection().isReversed()
       @compositeSelection.mergeIntersectingSelections({reverse})
+      @syncCursorAnimations()
 
   renderLines: ->
     @lineCache = []
@@ -514,5 +515,9 @@ class Editor extends View
     else if desiredLeft < @scroller.scrollLeft()
       @scroller.scrollLeft(desiredLeft)
 
+  syncCursorAnimations: ->
+    for cursor in @getCursors()
+      do (cursor) -> cursor.resetCursorAnimation()
+
   logLines: ->
     @renderer.logLines()