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/* global anchors */
// add anchor links to headers
anchors.options.placement = 'left';
anchors.add('h3');
// Filter UI
var tocElements = document.getElementById('toc')
.getElementsByTagName('li');
document.getElementById('filter-input')
.addEventListener('keyup', function (e) {
var i, element, children;
// enter key
if (e.keyCode === 13) {
// go to the first displayed item in the toc
for (i = 0; i < tocElements.length; i++) {
element = tocElements[i];
if (!element.classList.contains('display-none')) {
location.replace(element.firstChild.href);
return e.preventDefault();
}
}
}
var match = function () {
return true;
};
var value = this.value.toLowerCase();
if (!value.match(/^\s*$/)) {
match = function (element) {
return element.firstChild.innerHTML.toLowerCase().indexOf(value) !== -1;
};
}
for (i = 0; i < tocElements.length; i++) {
element = tocElements[i];
children = Array.from(element.getElementsByTagName('li'));
if (match(element) || children.some(match)) {
element.classList.remove('display-none');
} else {
element.classList.add('display-none');
}
}
});
var toggles = document.getElementsByClassName('toggle-step-sibling');
for (var i = 0; i < toggles.length; i++) {
toggles[i].addEventListener('click', toggleStepSibling);
}
function toggleStepSibling() {
var stepSibling = this.parentNode.parentNode.parentNode.getElementsByClassName('toggle-target')[0];
var klass = 'display-none';
if (stepSibling.classList.contains(klass)) {
stepSibling.classList.remove(klass);
stepSibling.innerHTML = '▾';
} else {
stepSibling.classList.add(klass);
stepSibling.innerHTML = '▸';
}
}
var items = document.getElementsByClassName('toggle-sibling');
for (var j = 0; j < items.length; j++) {
items[j].addEventListener('click', toggleSibling);
}
function toggleSibling() {
var stepSibling = this.parentNode.getElementsByClassName('toggle-target')[0];
var icon = this.getElementsByClassName('icon')[0];
var klass = 'display-none';
if (stepSibling.classList.contains(klass)) {
stepSibling.classList.remove(klass);
icon.innerHTML = '▾';
} else {
stepSibling.classList.add(klass);
icon.innerHTML = '▸';
}
}
function showHashTarget(targetId) {
var hashTarget = document.getElementById(targetId);
// new target is hidden
if (hashTarget && hashTarget.offsetHeight === 0 &&
hashTarget.parentNode.parentNode.classList.contains('display-none')) {
hashTarget.parentNode.parentNode.classList.remove('display-none');
}
}
window.addEventListener('hashchange', function() {
showHashTarget(location.hash.substring(1));
});
showHashTarget(location.hash.substring(1));
var toclinks = document.getElementsByClassName('pre-open');
for (var k = 0; k < toclinks.length; k++) {
toclinks[k].addEventListener('mousedown', preOpen, false);
}
function preOpen() {
showHashTarget(this.hash.substring(1));
}
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