   getUrl: -> chrome.runtime.getURL "content_scripts/vimium.css"
   parse: -> []
 
-completionEngines = [ Google, Youtube, DummySearchEngine ]
+completionEngines = [
+  Google
+  Youtube
+  Wikipedia
+  DummySearchEngine
+]
 
 SearchEngines =
   cancel: (searchUrl, callback = null) ->


    engine = @lookupEngine searchUrl
    url = engine.getUrl queryTerms
    @get searchUrl, url, (xhr = null) =>
      if xhr?
        # We keep at most three suggestions, the top three.  These are most likely to be useful.
        callback @completionCache.set completionCacheKey, engine.parse(xhr)[...3]
      else
        callback @completionCache.set completionCacheKey, callback []
        # We cache failures, but remove them after just ten minutes.  This (it is hoped) avoids repeated
        # XMLHttpRequest failures over a short period of time.

    "http://suggestqueries.google.com/complete/search?ss_protocol=legace&client=toolbar&q=#{Utils.createSearchQuery queryTerms}"

  parse: (xhr) ->
    for suggestion in xhr.responseXML.getElementsByTagName "suggestion"
      continue unless suggestion = suggestion.getAttribute "data"
      suggestion

class Youtube extends RegexpEngine
  constructor: ->
