/*
* Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.  Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

var noResult = {l: "No results found"};
var loading = {l: "Loading search index..."};
var catModules = "Modules";
var catPackages = "Packages";
var catTypes = "Classes and Interfaces";
var catMembers = "Members";
var catSearchTags = "Search Tags";
var highlight = "<span class=\"result-highlight\">$&</span>";
var searchPattern = "";
var fallbackPattern = "";
var RANKING_THRESHOLD = 2;
var NO_MATCH = 0xffff;
var MIN_RESULTS = 3;
var MAX_RESULTS = 500;
var UNNAMED = "<Unnamed>";
function escapeHtml(str) {
   return str.replace(/</g, "&lt;").replace(/>/g, "&gt;");
}
function getHighlightedText(item, matcher, fallbackMatcher) {
   var escapedItem = escapeHtml(item);
   var highlighted = escapedItem.replace(matcher, highlight);
   if (highlighted === escapedItem) {
       highlighted = escapedItem.replace(fallbackMatcher, highlight)
   }
   return highlighted;
}
function getURLPrefix(ui) {
   var urlPrefix="";
   var slash = "/";
   if (ui.item.category === catModules) {
       return ui.item.l + slash;
   } else if (ui.item.category === catPackages && ui.item.m) {
       return ui.item.m + slash;
   } else if (ui.item.category === catTypes || ui.item.category === catMembers) {
       if (ui.item.m) {
           urlPrefix = ui.item.m + slash;
       } else {
           $.each(packageSearchIndex, function(index, item) {
               if (item.m && ui.item.p === item.l) {
                   urlPrefix = item.m + slash;
               }
           });
       }
   }
   return urlPrefix;
}
function createSearchPattern(term) {
   var pattern = "";
   var isWordToken = false;
   term.replace(/,\s*/g, ", ").trim().split(/\s+/).forEach(function(w, index) {
       if (index > 0) {
           // whitespace between identifiers is significant
           pattern += (isWordToken && /^\w/.test(w)) ? "\\s+" : "\\s*";
       }
       var tokens = w.split(/(?=[A-Z,.()<>[\/])/);
       for (var i = 0; i < tokens.length; i++) {
           var s = tokens[i];
           if (s === "") {
               continue;
           }
           pattern += $.ui.autocomplete.escapeRegex(s);
           isWordToken =  /\w$/.test(s);
           if (isWordToken) {
               pattern += "([a-z0-9_$<>\\[\\]]*?)";
           }
       }
   });
   return pattern;
}
function createMatcher(pattern, flags) {
   var isCamelCase = /[A-Z]/.test(pattern);
   return new RegExp(pattern, flags + (isCamelCase ? "" : "i"));
}
var watermark = 'Search';
$(function() {
   var search = $("#search-input");
   var reset = $("#reset-button");
   search.val('');
   search.prop("disabled", false);
   reset.prop("disabled", false);
   search.val(watermark).addClass('watermark');
   search.blur(function() {
       if ($(this).val().length === 0) {
           $(this).val(watermark).addClass('watermark');
       }
   });
   search.on('click keydown paste', function() {
       if ($(this).val() === watermark) {
           $(this).val('').removeClass('watermark');
       }
   });
   reset.click(function() {
       search.val('').focus();
   });
   search.focus()[0].setSelectionRange(0, 0);
});
$.widget("custom.catcomplete", $.ui.autocomplete, {
   _create: function() {
       this._super();
       this.widget().menu("option", "items", "> :not(.ui-autocomplete-category)");
   },
   _renderMenu: function(ul, items) {
       var rMenu = this;
       var currentCategory = "";
       rMenu.menu.bindings = $();
       $.each(items, function(index, item) {
           var li;
           if (item.category && item.category !== currentCategory) {
               ul.append("<li class=\"ui-autocomplete-category\">" + item.category + "</li>");
               currentCategory = item.category;
           }
           li = rMenu._renderItemData(ul, item);
           if (item.category) {
               li.attr("aria-label", item.category + " : " + item.l);
               li.attr("class", "result-item");
           } else {
               li.attr("aria-label", item.l);
               li.attr("class", "result-item");
           }
       });
   },
   _renderItem: function(ul, item) {
       var label = "";
       var matcher = createMatcher(escapeHtml(searchPattern), "g");
       var fallbackMatcher = new RegExp(fallbackPattern, "gi")
       if (item.category === catModules) {
           label = getHighlightedText(item.l, matcher, fallbackMatcher);
       } else if (item.category === catPackages) {
           label = getHighlightedText(item.l, matcher, fallbackMatcher);
       } else if (item.category === catTypes) {
           label = (item.p && item.p !== UNNAMED)
                   ? getHighlightedText(item.p + "." + item.l, matcher, fallbackMatcher)
                   : getHighlightedText(item.l, matcher, fallbackMatcher);
       } else if (item.category === catMembers) {
           label = (item.p && item.p !== UNNAMED)
                   ? getHighlightedText(item.p + "." + item.c + "." + item.l, matcher, fallbackMatcher)
                   : getHighlightedText(item.c + "." + item.l, matcher, fallbackMatcher);
       } else if (item.category === catSearchTags) {
           label = getHighlightedText(item.l, matcher, fallbackMatcher);
       } else {
           label = item.l;
       }
       var li = $("<li/>").appendTo(ul);
       var div = $("<div/>").appendTo(li);
       if (item.category === catSearchTags && item.h) {
           if (item.d) {
               div.html(label + "<span class=\"search-tag-holder-result\"> (" + item.h + ")</span><br><span class=\"search-tag-desc-result\">"
                               + item.d + "</span><br>");
           } else {
               div.html(label + "<span class=\"search-tag-holder-result\"> (" + item.h + ")</span>");
           }
       } else {
           if (item.m) {
               div.html(item.m + "/" + label);
           } else {
               div.html(label);
           }
       }
       return li;
   }
});
function rankMatch(match, category) {
   if (!match) {
       return NO_MATCH;
   }
   var index = match.index;
   var input = match.input;
   var leftBoundaryMatch = 2;
   var periferalMatch = 0;
   // make sure match is anchored on a left word boundary
   if (index === 0 || /\W/.test(input[index - 1]) || "_" === input[index]) {
       leftBoundaryMatch = 0;
   } else if ("_" === input[index - 1] || (input[index] === input[index].toUpperCase() && !/^[A-Z0-9_$]+$/.test(input))) {
       leftBoundaryMatch = 1;
   }
   var matchEnd = index + match[0].length;
   var leftParen = input.indexOf("(");
   var endOfName = leftParen > -1 ? leftParen : input.length;
   // exclude peripheral matches
   if (category !== catModules && category !== catSearchTags) {
       var delim = category === catPackages ? "/" : ".";
       if (leftParen > -1 && leftParen < index) {
           periferalMatch += 2;
       } else if (input.lastIndexOf(delim, endOfName) >= matchEnd) {
           periferalMatch += 2;
       }
   }
   var delta = match[0].length === endOfName ? 0 : 1; // rank full match higher than partial match
   for (var i = 1; i < match.length; i++) {
       // lower ranking if parts of the name are missing
       if (match[i])
           delta += match[i].length;
   }
   if (category === catTypes) {
       // lower ranking if a type name contains unmatched camel-case parts
       if (/[A-Z]/.test(input.substring(matchEnd)))
           delta += 5;
       if (/[A-Z]/.test(input.substring(0, index)))
           delta += 5;
   }
   return leftBoundaryMatch + periferalMatch + (delta / 200);

}
function doSearch(request, response) {
   var result = [];
   searchPattern = createSearchPattern(request.term);
   fallbackPattern = createSearchPattern(request.term.toLowerCase());
   if (searchPattern === "") {
       return this.close();
   }
   var camelCaseMatcher = createMatcher(searchPattern, "");
   var fallbackMatcher = new RegExp(fallbackPattern, "i");

   function searchIndexWithMatcher(indexArray, matcher, category, nameFunc) {
       if (indexArray) {
           var newResults = [];
           $.each(indexArray, function (i, item) {
               item.category = category;
               var ranking = rankMatch(matcher.exec(nameFunc(item)), category);
               if (ranking < RANKING_THRESHOLD) {
                   newResults.push({ranking: ranking, item: item});
               }
               return newResults.length <= MAX_RESULTS;
           });
           return newResults.sort(function(e1, e2) {
               return e1.ranking - e2.ranking;
           }).map(function(e) {
               return e.item;
           });
       }
       return [];
   }
   function searchIndex(indexArray, category, nameFunc) {
       var primaryResults = searchIndexWithMatcher(indexArray, camelCaseMatcher, category, nameFunc);
       result = result.concat(primaryResults);
       if (primaryResults.length <= MIN_RESULTS && !camelCaseMatcher.ignoreCase) {
           var secondaryResults = searchIndexWithMatcher(indexArray, fallbackMatcher, category, nameFunc);
           result = result.concat(secondaryResults.filter(function (item) {
               return primaryResults.indexOf(item) === -1;
           }));
       }
   }

   searchIndex(moduleSearchIndex, catModules, function(item) { return item.l; });
   searchIndex(packageSearchIndex, catPackages, function(item) {
       return (item.m && request.term.indexOf("/") > -1)
           ? (item.m + "/" + item.l) : item.l;
   });
   searchIndex(typeSearchIndex, catTypes, function(item) {
       return request.term.indexOf(".") > -1 ? item.p + "." + item.l : item.l;
   });
   searchIndex(memberSearchIndex, catMembers, function(item) {
       return request.term.indexOf(".") > -1
           ? item.p + "." + item.c + "." + item.l : item.l;
   });
   searchIndex(tagSearchIndex, catSearchTags, function(item) { return item.l; });

   if (!indexFilesLoaded()) {
       updateSearchResults = function() {
           doSearch(request, response);
       }
       result.unshift(loading);
   } else {
       updateSearchResults = function() {};
   }
   response(result);
}
$(function() {
   $("#search-input").catcomplete({
       minLength: 1,
       delay: 300,
       source: doSearch,
       response: function(event, ui) {
           if (!ui.content.length) {
               ui.content.push(noResult);
           } else {
               $("#search-input").empty();
           }
       },
       autoFocus: true,
       focus: function(event, ui) {
           return false;
       },
       position: {
           collision: "flip"
       },
       select: function(event, ui) {
           if (ui.item.category) {
               var url = getURLPrefix(ui);
               if (ui.item.category === catModules) {
                   url += "module-summary.html";
               } else if (ui.item.category === catPackages) {
                   if (ui.item.u) {
                       url = ui.item.u;
                   } else {
                       url += ui.item.l.replace(/\./g, '/') + "/package-summary.html";
                   }
               } else if (ui.item.category === catTypes) {
                   if (ui.item.u) {
                       url = ui.item.u;
                   } else if (ui.item.p === UNNAMED) {
                       url += ui.item.l + ".html";
                   } else {
                       url += ui.item.p.replace(/\./g, '/') + "/" + ui.item.l + ".html";
                   }
               } else if (ui.item.category === catMembers) {
                   if (ui.item.p === UNNAMED) {
                       url += ui.item.c + ".html" + "#";
                   } else {
                       url += ui.item.p.replace(/\./g, '/') + "/" + ui.item.c + ".html" + "#";
                   }
                   if (ui.item.u) {
                       url += ui.item.u;
                   } else {
                       url += ui.item.l;
                   }
               } else if (ui.item.category === catSearchTags) {
                   url += ui.item.u;
               }
               if (top !== window) {
                   parent.classFrame.location = pathtoroot + url;
               } else {
                   window.location.href = pathtoroot + url;
               }
               $("#search-input").focus();
           }
       }
   });
});

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