Don't use config for scrollSensitivity in TextEditorComponent

Signed-off-by: Nathan Sobo <nathan@github.com>

src/text-editor-component.coffee

@@ -18,7 +18,6 @@ LineTopIndex = require 'line-top-index'
 
 module.exports =
 class TextEditorComponent
-  scrollSensitivity: 0.4
   cursorBlinkPeriod: 800
   cursorBlinkResumeDelay: 100
   tileSize: 12
@@ -47,8 +46,6 @@ class TextEditorComponent
     @tileSize = tileSize if tileSize?
     @disposables = new CompositeDisposable
 
-    @setScrollSensitivity(@config.get('editor.scrollSensitivity'))
-
     lineTopIndex = new LineTopIndex({
       defaultLineHeight: @editor.getLineHeightInPixels()
     })
@@ -340,7 +337,6 @@ class TextEditorComponent
     @disposables.add(@scopedConfigDisposables)
 
     scope = @editor.getRootScopeDescriptor()
-    @scopedConfigDisposables.add @config.observe 'editor.scrollSensitivity', {scope}, @setScrollSensitivity
 
   focused: ->
     if @mounted
@@ -408,7 +404,7 @@ class TextEditorComponent
     if Math.abs(wheelDeltaX) > Math.abs(wheelDeltaY)
       # Scrolling horizontally
       previousScrollLeft = @presenter.getScrollLeft()
-      updatedScrollLeft = previousScrollLeft - Math.round(wheelDeltaX * @scrollSensitivity)
+      updatedScrollLeft = previousScrollLeft - Math.round(wheelDeltaX * @editor.getScrollSensitivity() / 100)
 
       event.preventDefault() if @presenter.canScrollLeftTo(updatedScrollLeft)
       @presenter.setScrollLeft(updatedScrollLeft)
@@ -416,7 +412,7 @@ class TextEditorComponent
       # Scrolling vertically
       @presenter.setMouseWheelScreenRow(@screenRowForNode(event.target))
       previousScrollTop = @presenter.getScrollTop()
-      updatedScrollTop = previousScrollTop - Math.round(wheelDeltaY * @scrollSensitivity)
+      updatedScrollTop = previousScrollTop - Math.round(wheelDeltaY * @editor.getScrollSensitivity() / 100)
 
       event.preventDefault() if @presenter.canScrollTopTo(updatedScrollTop)
       @presenter.setScrollTop(updatedScrollTop)
@@ -926,10 +922,6 @@ class TextEditorComponent
     @linesYardstick.invalidateCache()
     @presenter.measurementsChanged()
 
-  setScrollSensitivity: (scrollSensitivity) =>
-    if scrollSensitivity = parseInt(scrollSensitivity)
-      @scrollSensitivity = Math.abs(scrollSensitivity) / 100
-
   screenPositionForMouseEvent: (event, linesClientRect) ->
     pixelPosition = @pixelPositionForMouseEvent(event, linesClientRect)
     @screenPositionForPixelPosition(pixelPosition)

src/text-editor.coffee

@@ -80,6 +80,7 @@ class TextEditor extends Model
   atomicSoftTabs: true
   invisibles: null
   showLineNumbers: true
+  scrollSensitivity: 40
 
   Object.defineProperty @prototype, "element",
     get: -> @getElement()
@@ -3359,6 +3360,10 @@ class TextEditor extends Model
 
   getScrollPastEnd: -> @scrollPastEnd
 
+  setScrollSensitivity: (@scrollSensitivity) ->
+
+  getScrollSensitivity: -> @scrollSensitivity
+
   setShowLineNumbers: (showLineNumbers) ->
     if showLineNumbers isnt @showLineNumbers
       @showLineNumbers = showLineNumbers