Update editor component when a visible selection is removed

spec/editor-component-spec.coffee

@@ -53,8 +53,8 @@ describe "EditorComponent", ->
     expect(cursorNodes[0].offsetTop).toBe 0
     expect(cursorNodes[0].offsetLeft).toBe 5 * charWidth
 
-    cursor3 = editor.addCursorAtScreenPosition([6, 11])
-    cursor2 = editor.addCursorAtScreenPosition([4, 10])
+    cursor2 = editor.addCursorAtScreenPosition([6, 11])
+    cursor3 = editor.addCursorAtScreenPosition([4, 10])
 
     cursorNodes = node.querySelectorAll('.cursor')
     expect(cursorNodes.length).toBe 2
@@ -72,3 +72,9 @@ describe "EditorComponent", ->
     expect(cursorNodes[0].offsetLeft).toBe 11 * charWidth
     expect(cursorNodes[1].offsetTop).toBe 4 * lineHeight
     expect(cursorNodes[1].offsetLeft).toBe 10 * charWidth
+
+    cursor3.destroy()
+    cursorNodes = node.querySelectorAll('.cursor')
+    expect(cursorNodes.length).toBe 1
+    expect(cursorNodes[0].offsetTop).toBe 6 * lineHeight
+    expect(cursorNodes[0].offsetLeft).toBe 11 * charWidth

src/editor-component.coffee

@@ -65,6 +65,7 @@ EditorCompont = React.createClass
     {editor} = @props
     @subscribe editor, 'screen-lines-changed', @onScreenLinesChanged
     @subscribe editor, 'selection-added', @onSelectionAdded
+    @subscribe editor, 'selection-removed', @onSelectionAdded
 
     @updateAllDimensions()
     @props.editor.setVisible(true)
@@ -104,6 +105,9 @@ EditorCompont = React.createClass
   onSelectionAdded: (selection) ->
     @forceUpdate() if @selectionIntersectsVisibleRowRange(selection)
 
+  onSelectionRemoved: (selection) ->
+    @forceUpdate() if @selectionIntersectsVisibleRowRange(selection)
+
   getVisibleRowRange: ->
     return [0, 0] unless @state.lineHeight > 0
 

src/editor.coffee

@@ -1202,6 +1202,7 @@ class Editor extends Model
   # Remove the given selection.
   removeSelection: (selection) ->
     _.remove(@selections, selection)
+    @emit 'selection-removed', selection
 
   # Reduce one or more selections to a single empty selection based on the most
   # recently added cursor.