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Copy pathsearch.js
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188 lines (158 loc) · 5.46 KB
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$(function() {
var searchIndex,
searchHits,
searchWorker = new Worker("/assets/javascripts/search_worker.js");
$('.help-search .search-box').focus(function(){
$(this).css('background-position','0px -25px')
});
$('.help-search .search-box').focusout(function(){
if($(this).val() == ''){
$(this).css('background-position','0px 0px')
}
});
// Load the JSON containing all pages
// Has it been loaded before (and stored with localstorage)?
if (localStorage['searchIndex']) {
searchIndex = JSON.parse(localStorage['searchIndex']);
if (localStorageHasExpired()) {
loadSearchIndex();
}
else {
searchIndex.type = "index";
searchWorker.postMessage(searchIndex);
}
} else {
loadSearchIndex();
}
function loadSearchIndex() {
$.getJSON('/search/search-index.json', function(data) {
data.type = { index: true };
searchWorker.postMessage(data);
searchIndex = data;
localStorage['searchIndex'] = JSON.stringify(searchIndex);
localStorage['updated'] = new Date().getTime();
});
}
function localStorageHasExpired() {
// Expires in one day (86400000 ms)
if (new Date().getTime() - parseInt(localStorage['updated'],10) > 86400000) {
return true;
}
return false;
}
// Expand and activate search if the page loaded with a value set for the search field
if ($("#searchfield").val().length > 0) {
$("#search-container").addClass("active");
searchForString($("#searchfield").val());
}
// On input change, update the search results
$("#searchfield").on("input", function(e) {
$(this).val().length > 0 ? $("#search-container").addClass("active") : $("#search-container").removeClass("active");
searchForString($(this).val());
});
// Global keyboard shortcuts
$("body").keyup(function(e) {
if (e.keyCode == 83) {
// S key
if ($("#searchfield").is(":focus"))
return;
e.preventDefault();
$("#searchfield").focus();
}
});
// Keyboard support for the search field
$("#searchfield").keyup(function(e) {
if (e.keyCode == 27) {
// ESC
e.preventDefault();
$("#searchfield").val().length > 0 ? cancelSearch() : $("#searchfield").blur();
} else if (e.keyCode == 13) {
// Return/enter
e.preventDefault();
goToSelectedSearchResult();
} else if (e.keyCode == 8 || e.keyCode == 46) {
// Update search if backspace/delete was pressed
// IE9 doesn't trigger the input event on backspace/delete,
// but they do trigger keyUp
$(this).val().length > 0 ? $("#search-container").addClass("active") : $("#search-container").removeClass("active");
searchForString($(this).val());
}
}).keydown(function(e) {
if (e.keyCode == 38) {
// Arrow up
e.preventDefault();
moveSearchSelectionUp();
} else if (e.keyCode == 40) {
// Arrow down
e.preventDefault();
moveSearchSelectionDown();
} else if (e.keyCode == 27) {
// Prevent default on ESC key
// IE inputs come with some native behaviors that will
// prevent the DOM from updating correctly unless prevented
e.preventDefault();
}
});
// Make clicking the label focus the input label
// for browsers (IE) that doesn't support pointer-events: none
$("#search-container .search-placeholder").click(function(e) {
$("#searchfield").focus();
});
$(".cancel-search").click(function(e) {
cancelSearch();
});
function cancelSearch() {
$("#searchfield").val("");
$("#search-container").removeClass("active");
}
function searchForString(searchString) {
searchHits = [];
searchString = searchString.toLowerCase();
searchWorker.postMessage({ query: searchString, type: "search" })
}
searchWorker.addEventListener("message", function (e) {
if (e.data.type.search) {
renderResultsForSearch(e.data.query, e.data.results);
}
});
// Update the UI representation of the search hits
function renderResultsForSearch(searchString, searchHits){
$("#search-results").empty();
// Check if there are any results. If not, show placeholder and exit
if (searchHits.length < 1) {
$('<li class="placeholder">No results for <em></em></li>').appendTo("#search-results").find("em").text(searchString);
return;
}
// Render results (max 8)
for (var i = 0; i < Math.min(searchHits.length, 8); i++) {
var page = searchHits[i];
$('<li class="result"><a href="' + page.url + '"><em>' + page.title + '</em></a></li>').appendTo("#search-results");
}
// Select the first alternative
$("#search-results li:first-child").addClass("selected");
}
// Move the selected list item when hovering
$("#search-results").on("mouseenter", "li", function(e) {
$(this).parent().find(".selected").removeClass("selected").end().end()
.addClass("selected");
});
function moveSearchSelectionUp() {
$prev = $("#search-results .selected").prev();
if ($prev.length < 1)
return;
$("#search-results .selected").removeClass("selected");
$prev.addClass("selected");
}
function moveSearchSelectionDown() {
$next = $("#search-results .selected").next();
if ($next.length < 1)
return;
$("#search-results .selected").removeClass("selected");
$next.addClass("selected");
}
function goToSelectedSearchResult() {
var href = $("#search-results .selected a").attr("href");
if (href)
window.location.href = href;
}
});