From 7d38a32a5a39256fafb5eac615be1f317bc37a75 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=B2=88=E5=94=81?= <52o@qq52o.cn>
Date: Wed, 13 May 2020 08:58:34 +0800
Subject: [PATCH] Create sidebar.js

---
 src/ core/event/sidebar.js | 104 +++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 src/ core/event/sidebar.js

diff --git a/src/ core/event/sidebar.js b/src/ core/event/sidebar.js
new file mode 100644
index 00000000..b15cb2af
--- /dev/null
+++ b/src/ core/event/sidebar.js	
@@ -0,0 +1,104 @@
+/* eslint-disable no-unused-vars */
+import { isMobile } from '../util/env';
+import * as dom from '../util/dom';
+
+const title = dom.$.title;
+/**
+ * Toggle button
+ * @param {Element} el Button to be toggled
+ * @void
+ */
+export function btn(el) {
+  const toggle = _ => dom.body.classList.toggle('close');
+
+  el = dom.getNode(el);
+  if (el === null || el === undefined) {
+    return;
+  }
+
+  dom.on(el, 'click', e => {
+    e.stopPropagation();
+    toggle();
+  });
+
+  isMobile &&
+    dom.on(
+      dom.body,
+      'click',
+      _ => dom.body.classList.contains('close') && toggle()
+    );
+}
+
+export function collapse(el) {
+  el = dom.getNode(el);
+  if (el === null || el === undefined) {
+    return;
+  }
+
+  dom.on(el, 'click', ({ target }) => {
+    if (
+      target.nodeName === 'A' &&
+      target.nextSibling &&
+      target.nextSibling.classList &&
+      target.nextSibling.classList.contains('app-sub-sidebar')
+    ) {
+      dom.toggleClass(target.parentNode, 'collapse');
+    }
+  });
+}
+
+export function sticky() {
+  const cover = dom.getNode('section.cover');
+  if (!cover) {
+    return;
+  }
+
+  const coverHeight = cover.getBoundingClientRect().height;
+
+  if (window.pageYOffset >= coverHeight || cover.classList.contains('hidden')) {
+    dom.toggleClass(dom.body, 'add', 'sticky');
+  } else {
+    dom.toggleClass(dom.body, 'remove', 'sticky');
+  }
+}
+
+/**
+ * Get and active link
+ * @param  {Object} router Router
+ * @param  {String|Element} el Target element
+ * @param  {Boolean} isParent Active parent
+ * @param  {Boolean} autoTitle Automatically set title
+ * @return {Element} Active element
+ */
+export function getAndActive(router, el, isParent, autoTitle) {
+  el = dom.getNode(el);
+  let links = [];
+  if (el !== null && el !== undefined) {
+    links = dom.findAll(el, 'a');
+  }
+
+  const hash = decodeURI(router.toURL(router.getCurrentPath()));
+  let target;
+
+  links
+    .sort((a, b) => b.href.length - a.href.length)
+    .forEach(a => {
+      const href = a.getAttribute('href');
+      const node = isParent ? a.parentNode : a;
+
+      if (hash.indexOf(href) === 0 && !target) {
+        target = a;
+        dom.toggleClass(node, 'add', 'active');
+      } else {
+        dom.toggleClass(node, 'remove', 'active');
+      }
+    });
+
+  if (autoTitle) {
+    dom.$.title = target
+      ? target.title || `${target.innerText} - ${title}`
+      : title;
+  }
+
+  return target;
+}