From 1d54694dfc68a31e5f498a4c8f855b6d39456d63 Mon Sep 17 00:00:00 2001
From: Vitaly Takmazov
Date: Mon, 25 Jun 2018 14:10:27 +0300
Subject: Header component

---
 vnext/src/index.js | 67 ++++--------------------------------------------------
 1 file changed, 4 insertions(+), 63 deletions(-)

(limited to 'vnext/src/index.js')

diff --git a/vnext/src/index.js b/vnext/src/index.js
index 2caaf5bb..aeb5357f 100644
--- a/vnext/src/index.js
+++ b/vnext/src/index.js
@@ -13,9 +13,7 @@ import Thread from './components/Thread';
 import LoginButton from './components/LoginButton';
 import Footer from './components/Footer';
 import Avatar from './components/Avatar';
-
-const elClassHidden = 'header--hidden'
-const elClassBackground = 'header--background';
+import Header from './components/Header';
 
 class App extends React.Component {
   constructor(props) {
@@ -29,75 +27,18 @@ class App extends React.Component {
       visitor: {
         uid: Number(window.localStorage.uid) || 0,
         hash: window.localStorage.hash || params.hash || ''
-      },
-      headerClassName: ''
+      }
     };
-    this.dHeight = 0;
-    this.wHeight = 0;
-    this.wScrollCurrent = 0;
-    this.wScrollBefore = 0;
-    this.wScrollDiff = 0;
   }
-
   componentDidMount() {
-    window.addEventListener('scroll', this.throttle(500, () => {
-      this.dHeight = document.body.offsetHeight;
-      this.wHeight = window.innerHeight;
-      this.wScrollCurrent = window.pageYOffset;
-      this.wScrollDiff = this.wScrollBefore - this.wScrollCurrent;
-
-      if (this.wScrollCurrent <= 0) {
-        // scrolled to the very top; element sticks to the top
-        this.setState({
-          headerClassName: ''
-        })
-      } else if (this.wScrollDiff > 0 && this.state.headerClassName.indexOf(elClassHidden) >= 0) {
-        // scrolled up; element slides in
-        this.setState({
-          headerClassName: elClassBackground
-        })
-      } else if (this.wScrollDiff < 0) {
-        // scrolled down
-        if (this.wScrollCurrent + this.wHeight >= this.dHeight && this.state.headerClassName.indexOf(elClassHidden) >= 0) {
-          // scrolled to the very bottom; element slides in
-          this.setState({
-            headerClassName: elClassBackground
-          })
-        } else {
-          // scrolled down; element slides out
-          this.setState({
-            headerClassName: [elClassHidden, elClassBackground].join(' ')
-          })
-        }
-      }
-      this.wScrollBefore = this.wScrollCurrent;
-    }));
     this.auth(this.state.visitor.hash)
   }
-  throttle(delay, fn) {
-    var last, deferTimer;
-    return function () {
-      var context = this, args = arguments, now = +new Date;
-      if (last && now < last + delay) {
-        clearTimeout(deferTimer);
-        deferTimer = setTimeout(
-          function () {
-            last = now;
-            fn.apply(context, args);
-          },
-          delay);
-      } else {
-        last = now;
-        fn.apply(context, args);
-      }
-    };
-  };
   render() {
     const user = this.state.visitor;
     return (
       <Router>
         <React.Fragment>
-          <header className={this.state.headerClassName}>
+          <Header>
             <div id="header_wrapper">
               {user.uid > 0 ?
                 <div id="ctitle">
@@ -130,7 +71,7 @@ class App extends React.Component {
                 </ul>
               </nav>
             </div>
-          </header>
+          </Header>
           <div id="wrapper">
             <section id="content">
               <Switch>
-- 
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