Update selections when the line height changes

spec/editor-component-spec.coffee

@@ -456,6 +456,12 @@ describe "EditorComponent", ->
 
       expect(node.querySelectorAll('.selection').length).toBe 1
 
+    it "updates selections when the line height changes", ->
+      editor.setSelectedBufferRange([[1, 6], [1, 10]])
+      component.setLineHeight(2)
+      selectionNode = node.querySelector('.region')
+      expect(selectionNode.offsetTop).toBe editor.getLineHeightInPixels()
+
   describe "hidden input field", ->
     it "renders the hidden input field at the position of the last cursor if the cursor is on screen and the editor is focused", ->
       editor.setVerticalScrollMargin(0)

src/selections-component.coffee

@@ -1,6 +1,6 @@
 React = require 'react-atom-fork'
 {div} = require 'reactionary-atom-fork'
-{isEqual} = require 'underscore-plus'
+{isEqualForProperties} = require 'underscore-plus'
 SelectionComponent = require './selection-component'
 
 module.exports =
@@ -22,4 +22,4 @@ SelectionsComponent = React.createClass
     @selectionRanges = {}
 
   shouldComponentUpdate: (newProps) ->
-    not isEqual(newProps.selectionScreenRanges, @props.selectionScreenRanges)
+    not isEqualForProperties(newProps, @props, 'selectionScreenRanges', 'lineHeightInPixels')