Bulk commit of documentation for v2017.05

js/search.js

@@ -0,0 +1,130 @@
+(function() {
+  function noResults() {
+    var searchResults = document.getElementById("search-results");
+    searchResults.innerHTML = "<div>No results found</div>";
+  }
+
+  function hilightText(regexes, text) {
+    for (var i = 0; i < regexes.length; i++) {
+      text = text.replace(regexes[i], "<span class='search-hilight'>$1</span>");
+    }
+    return text;
+  }
+
+  function matchRegexes(metadata) {
+    var regexes = [];
+    for (var kw in metadata) {
+      regexes.push(new RegExp("\\b("+kw+"\\w*)", "mig"));
+    }
+    return regexes;
+  }
+
+  function getMatchingSubtitle(item, from) {
+    var subtitle = $(from).prevAll(":header:first");
+    if (subtitle.length > 0) {
+      return {
+        content: "<p class='search-result-subtitle'><a href='"+window.baseurl+item.url+"#"+subtitle[0].id+"'>"+$(subtitle[0]).text()+"</a></p>",
+        id: subtitle[0].id
+      };
+    }
+    if ($(from).parent().length === 0) {
+      return null;
+    } else {
+      return getMatchingSubtitle(item, $(from).parent()[0]);
+    }
+  }
+
+  function getMatchingText(regexes, item, paragraph, lastSubtitle) {
+    var matchingText = "";
+    var text = paragraph.text();
+    for (var j = 0; j < regexes.length; j++) {
+      var match = regexes[j].exec(text);
+      if (match) {
+        var subtitle = getMatchingSubtitle(item, paragraph);
+        if (subtitle !== null && lastSubtitle != subtitle.id) {
+          matchingText += subtitle.content;
+          lastSubtitle = subtitle.id;
+        }
+        matchingText += "<p class='search-result-data'>" + hilightText(regexes, text) + "</p>";
+        return {
+          content: matchingText,
+          lastSubtitle: lastSubtitle
+        };
+      }
+    }
+    return null;
+  }
+
+  function getItemText(item, metadata) {
+    var itemText = "<div><h3 class='search-result-title'><a href='"+window.baseurl+item.url+"'>"+item.title+"</a></h3>";
+    var dummy = document.createElement("div");
+    dummy.innerHTML = item.html;
+    var paragraphs = $(dummy).find("p, li, div, td");
+    var lastSubtitle = null;
+    var regexes = matchRegexes(metadata);
+    for (var p = 0;  p < paragraphs.length; p++) {
+      var matchingText = getMatchingText(regexes, item, $(paragraphs[p]), lastSubtitle);
+      if (matchingText !== null) {
+        itemText += matchingText.content;
+        lastSubtitle = matchingText.lastSubtitle;
+      }
+    }
+    itemText += "</div>";
+    return itemText;
+  }
+
+  function displaySearchResults(term, results, store) {
+    if (results.length === 0) {
+      noResults();
+    } else {
+      var searchResults = document.getElementById("search-results");
+      var append = "";
+      for (var i = 0; i < results.length; i++) {
+        var item = store[results[i].ref];
+        append += getItemText(item, results[i].matchData.metadata);
+      }
+      searchResults.innerHTML = append;
+    }
+  }
+
+  function getQueryVariable(variable) {
+    var query = window.location.search.substring(1);
+    var vars = query.split("&");
+    for (var i = 0; i < vars.length; i++) {
+      var pair = vars[i].split("=");
+
+      if (pair[0] === variable) {
+        return decodeURIComponent(pair[1].replace(/\+/g, "%20"));
+      }
+    }
+  }
+
+  function createIndex() {
+    var index = lunr(function() {
+      this.field("title");
+      this.field("content");
+
+      for (var key in window.store) {
+        this.add({
+          "id": key,
+          "title": window.store[key].title,
+          "content": window.store[key].content
+        });
+      }
+    });
+ 
+    return index;
+  }
+
+  var searchTerm = getQueryVariable("q");
+  if (searchTerm) {
+    document.getElementById("search-title").innerHTML = searchTerm;
+  
+    var index = createIndex();
+
+    var results = index.search(searchTerm);
+    displaySearchResults(searchTerm, results, window.store);
+  } else {
+    noResults();
+  }
+})();