Add setting to disable smooth scrolling

assets/javascripts/app/settings.coffee

@@ -40,13 +40,6 @@ class app.Settings
     @store.set TIPS_KEY, tips.join('/')
     return
 
-  setDark: (value) ->
-    @store.set DARK_KEY, !!value
-    return
-
-  getDark: ->
-    @store.get DARK_KEY
-
   setLayout: (name, enable) ->
     layout = (@store.get(LAYOUT_KEY) || '').split(' ')
     $.arrayDelete(layout, '')

assets/javascripts/templates/pages/settings_tmpl.coffee

@@ -17,6 +17,16 @@ app.templates.settingsPage = (settings) -> """
     </div>
   </div>
 
+  <div class="_settings-fieldset">
+    <h2 class="_settings-legend">Scrolling:</h2>
+
+    <div class="_settings-inputs">
+      <label class="_settings-label">
+        <input type="checkbox" name="smoothScroll" value="1"#{if settings.smoothScroll then ' checked' else ''}>Use smooth scrolling
+      </label>
+    </div>
+  </div>
+
   <div class="_settings-fieldset">
     <h2 class="_settings-legend">Advanced:</h2>
 

assets/javascripts/views/content/content.coffee

@@ -64,7 +64,10 @@ class app.views.Content extends app.View
     return
 
   smoothScrollTo: (value) ->
-    $.smoothScroll @scrollEl, value or 0
+    if app.settings.get('fastScroll')
+      @scrollTo value
+    else
+      $.smoothScroll @scrollEl, value or 0
     return
 
   scrollBy: (n) ->

assets/javascripts/views/content/settings_page.coffee

@@ -13,7 +13,8 @@ class app.views.SettingsPage extends app.View
 
   currentSettings: ->
     settings = {}
-    settings.dark = app.settings.getDark()
+    settings.dark = app.settings.get('dark')
+    settings.smoothScroll = !app.settings.get('fastScroll')
     settings[layout] = app.settings.hasLayout(layout) for layout in LAYOUTS
     settings
 
@@ -25,7 +26,7 @@ class app.views.SettingsPage extends app.View
     alt = css.getAttribute('data-alt')
     css.setAttribute('data-alt', css.getAttribute('href'))
     css.setAttribute('href', alt)
-    app.settings.setDark(enable)
+    app.settings.set('dark', !!enable)
     app.appCache?.updateInBackground()
     return
 
@@ -35,6 +36,10 @@ class app.views.SettingsPage extends app.View
     app.appCache?.updateInBackground()
     return
 
+  toggleSmoothScroll: (enable) ->
+    app.settings.set('fastScroll', !enable)
+    return
+
   onChange: (event) =>
     input = event.target
     switch input.name
@@ -42,6 +47,8 @@ class app.views.SettingsPage extends app.View
         @toggleDark input.checked
       when 'layout'
         @toggleLayout input.value, input.checked
+      when 'smoothScroll'
+        @toggleSmoothScroll input.checked
     return
 
   onRoute: (route) =>