Merge pull request #281 from dotnet/fix#279

Fix #279: Provide with a config file to customize stop-words

src/docfx.website.themes/default/search-stopwords.json

@@ -0,0 +1,121 @@
+[
+  "a",
+  "able",
+  "about",
+  "across",
+  "after",
+  "all",
+  "almost",
+  "also",
+  "am",
+  "among",
+  "an",
+  "and",
+  "any",
+  "are",
+  "as",
+  "at",
+  "be",
+  "because",
+  "been",
+  "but",
+  "by",
+  "can",
+  "cannot",
+  "could",
+  "dear",
+  "did",
+  "do",
+  "does",
+  "either",
+  "else",
+  "ever",
+  "every",
+  "for",
+  "from",
+  "get",
+  "got",
+  "had",
+  "has",
+  "have",
+  "he",
+  "her",
+  "hers",
+  "him",
+  "his",
+  "how",
+  "however",
+  "i",
+  "if",
+  "in",
+  "into",
+  "is",
+  "it",
+  "its",
+  "just",
+  "least",
+  "let",
+  "like",
+  "likely",
+  "may",
+  "me",
+  "might",
+  "most",
+  "must",
+  "my",
+  "neither",
+  "no",
+  "nor",
+  "not",
+  "of",
+  "off",
+  "often",
+  "on",
+  "only",
+  "or",
+  "other",
+  "our",
+  "own",
+  "rather",
+  "said",
+  "say",
+  "says",
+  "she",
+  "should",
+  "since",
+  "so",
+  "some",
+  "than",
+  "that",
+  "the",
+  "their",
+  "them",
+  "then",
+  "there",
+  "these",
+  "they",
+  "this",
+  "tis",
+  "to",
+  "too",
+  "twas",
+  "us",
+  "wants",
+  "was",
+  "we",
+  "were",
+  "what",
+  "when",
+  "where",
+  "which",
+  "while",
+  "who",
+  "whom",
+  "why",
+  "will",
+  "with",
+  "would",
+  "yet",
+  "you",
+  "your"
+]

src/docfx.website.themes/default/styles/search-worker.js

@@ -2,11 +2,23 @@
   importScripts('lunr.min.js');
 
   var lunrIndex = lunr(function() {
+      this.pipeline.remove(lunr.stopWordFilter);
       this.ref('href');
       this.field('title', {boost: 50});
       this.field('keywords', {boost: 20});
   });
   lunr.tokenizer.seperator = /[\s\-\.]+/;
+
+  var stopWordsRequest = new XMLHttpRequest();
+  stopWordsRequest.open('GET', '../search-stopwords.json');
+  stopWordsRequest.onload = function() {
+    var stopWords = JSON.parse(this.responseText);
+    var docfxStopWordFilter = lunr.generateStopWordFilter(stopWords);
+    lunr.Pipeline.registerFunction(docfxStopWordFilter, 'docfxStopWordFilter');
+    lunrIndex.pipeline.add(docfxStopWordFilter);
+  }
+  stopWordsRequest.send();
+
   var searchData = {};
   var searchDataRequest = new XMLHttpRequest();