gopl-zh.github.com/gitbook/plugins/gitbook-plugin-search/search.js

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JavaScript
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2015-12-09 07:57:17 +00:00
require([
"gitbook",
"lodash"
], function(gitbook, _) {
var index = null;
var $searchInput, $searchForm;
// Use a specific index
function loadIndex(data) {
index = lunr.Index.load(data);
}
// Fetch the search index
function fetchIndex() {
$.getJSON(gitbook.state.basePath+"/search_index.json")
.then(loadIndex);
}
// Search for a term and return results
function search(q) {
if (!index) return;
var results = _.chain(index.search(q))
.map(function(result) {
var parts = result.ref.split("#")
return {
path: parts[0],
hash: parts[1]
}
})
.value();
return results;
}
// Create search form
function createForm(value) {
if ($searchForm) $searchForm.remove();
$searchForm = $('<div>', {
'class': 'book-search',
'role': 'search'
});
$searchInput = $('<input>', {
'type': 'text',
'class': 'form-control',
'val': value,
'placeholder': 'Type to search'
});
$searchInput.appendTo($searchForm);
$searchForm.prependTo(gitbook.state.$book.find('.book-summary'));
}
// Return true if search is open
function isSearchOpen() {
return gitbook.state.$book.hasClass("with-search");
}
// Toggle the search
function toggleSearch(_state) {
if (isSearchOpen() === _state) return;
gitbook.state.$book.toggleClass("with-search", _state);
// If search bar is open: focus input
if (isSearchOpen()) {
gitbook.sidebar.toggle(true);
$searchInput.focus();
} else {
$searchInput.blur();
$searchInput.val("");
gitbook.sidebar.filter(null);
}
}
// Recover current search when page changed
function recoverSearch() {
var keyword = gitbook.storage.get("keyword", "");
createForm(keyword);
if (keyword.length > 0) {
if(!isSearchOpen()) {
toggleSearch();
}
gitbook.sidebar.filter(_.pluck(search(keyword), "path"));
}
};
gitbook.events.bind("start", function(config) {
// Pre-fetch search index and create the form
fetchIndex();
createForm();
// Type in search bar
$(document).on("keyup", ".book-search input", function(e) {
var key = (e.keyCode ? e.keyCode : e.which);
var q = $(this).val();
if (key == 27) {
e.preventDefault();
toggleSearch(false);
return;
}
if (q.length == 0) {
gitbook.sidebar.filter(null);
gitbook.storage.remove("keyword");
} else {
var results = search(q);
gitbook.sidebar.filter(
_.pluck(results, "path")
);
gitbook.storage.set("keyword", q);
}
});
// Create the toggle search button
gitbook.toolbar.createButton({
icon: 'fa fa-search',
label: 'Search',
position: 'left',
onClick: toggleSearch
});
// Bind keyboard to toggle search
gitbook.keyboard.bind(['f'], toggleSearch)
});
gitbook.events.bind("page.change", recoverSearch);
});