1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
import { Component } from '../component.ts'import { h } from '../core.ts'import { boxShadow, zIndex } from './_config.ts'
const classes = {  container: 'appBar_container',  scrollingDown: 'appBar_scrolling_down'}
interface AppBarProps {  maxWidth?: number  autoHide?: boolean  autoMerge?: boolean  background?: string  color?: string}
export class AppBar extends Component<AppBarProps> {  curr_scrollY: number = 0  last_scrollY: number = 0  curr_scrollingState = 'none'  last_scrollingState = 'none'  container: HTMLElement
  calcScrollPosition() {    this.curr_scrollY = window.scrollY
    if (this.curr_scrollY > this.last_scrollY) {      this.curr_scrollingState = 'down'    } else if (this.curr_scrollY < this.last_scrollY) {      this.curr_scrollingState = 'up'    }
    this.last_scrollY = this.curr_scrollY  }
  scroll() {    this.calcScrollPosition()
    if (this.curr_scrollY < 1) {      this.container.classList.remove('appBar_scrolling_down')    } else if (this.last_scrollingState !== this.curr_scrollingState) {      this.last_scrollingState = this.curr_scrollingState
      if (this.curr_scrollingState === 'down') this.container.classList.add('appBar_scrolling_down')      else this.container.classList.remove('appBar_scrolling_down')    }  }
  merge() {    this.calcScrollPosition()
    if (this.curr_scrollY <= 1) {      this.container.classList.add('appBar_merged')    } else {      this.container.classList.remove('appBar_merged')    }  }
  didMount() {    this.curr_scrollY = this.last_scrollY = window.scrollY
    if (this.props.autoHide) window.addEventListener('scroll', () => this.scroll())    if (this.props.autoMerge) window.addEventListener('scroll', () => this.merge())  }
  didUnmount() {    if (this.props.autoHide) window.removeEventListener('scroll', this.scroll)    if (this.props.autoMerge) window.removeEventListener('scroll', () => this.merge())  }
  render() {    const { background = '#6200EE', color = 'white' } = this.props
    const styles = `    .appBar_container {      background: ${background};      color: ${color};      font-weight: 500;
      z-index: ${zIndex.bar}
      position: fixed;      top: 0;      left: 0;      min-height: 24px;      width: 100vw;

      ${boxShadow}
      transition: top 0.2s, -webkit-box-shadow 0.5s, -moz-box-shadow 0.5s, box-shadow 0.5s;    }
    .appBar_container.appBar_scrolling_down {      top: -56px;    }
    .appBar_container.appBar_merged {      -webkit-box-shadow: none;      -moz-box-shadow: none;      box-shadow: none;    }
    .appBar_container .toolbar_container {      display: flex;      justify-content: space-between;    }
    .appBar_container .toolbar_container,    .appBar_container .tabs_container {      margin: 0 auto;      ${this.props.maxWidth ? `max-width: ${this.props.maxWidth}px;` : ''}    }
    .appBar_container .toolbar_container .toolbar_left,    .appBar_container .toolbar_container .toolbar_right {      display: flex;      align-items: center;          }
    .appBar_container .toolbar_container .toolbar_left {      white-space: nowrap;      overflow: hidden;      text-overflow: ellipsis;    }
    .appBar_container .toolbar_title {      font-size: 20px;      white-space: nowrap;      overflow: hidden;      text-overflow: ellipsis;    }    `
    document.head.appendChild(h('style', {}, styles))
    const mergedClass = this.props.autoMerge ? 'appBar_merged' : ''
    // @ts-ignore    this.container = h('div', { class: `${classes.container} ${mergedClass}` }, this.props.children)
    return this.container  }}