pinafore/src/routes/_components/NavItem.html
2019-03-18 09:09:24 -07:00

180 lines
4.6 KiB
HTML

<a class='main-nav-link {selected ? "selected" : ""}'
aria-label={ariaLabel}
aria-current={selected}
on:click="onClick(event)"
rel="prefetch"
{href} >
<div class="nav-icon-and-label">
<NavItemIcon
{showBadge}
{badgeNumber}
{svg}
/>
<span class="nav-link-label">{label}</span>
</div>
<div class="nav-indicator"
nav-indicator-key={name}
ref:indicator
></div>
</a>
<style>
.main-nav-link {
text-decoration: none;
display: flex;
justify-content: center;
align-items: center;
flex: 1;
flex-direction: column;
}
.nav-icon-and-label {
padding: 15px 20px;
display: flex;
justify-content: center;
align-items: center;
flex: 1;
}
.main-nav-link.selected {
background: var(--nav-a-selected-bg);
}
.main-nav-link.selected:hover {
background: var(--nav-a-selected-bg-hover);
}
.nav-indicator {
width: 100%;
height: 1px;
background: var(--nav-a-border);
transform-origin: left;
}
.nav-indicator.animate {
transition: transform 333ms ease-in-out;
will-change: transform;
}
.main-nav-link:hover .nav-indicator {
background: var(--nav-a-border-hover);
}
.main-nav-link.selected .nav-indicator {
background: var(--nav-a-selected-border);
}
.main-nav-link.selected:hover .nav-indicator {
background: var(--nav-a-selected-border-hover);
}
.main-nav-link:hover {
background-color: var(--nav-a-bg-hover);
text-decoration: none;
}
.main-nav-link:hover .nav-link-label {
color: var(--nav-text-color-hover);
}
.main-nav-link:active {
background-color: var(--nav-active-bg);
}
.main-nav-link.selected:active {
background-color: var(--nav-a-selected-active-bg);
}
.nav-link-label {
font-size: 16px;
color: var(--nav-text-color);
padding-left: 10px;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
@media (max-width: 991px) {
.main-nav-link .nav-link-label {
display: none;
}
.nav-icon-and-label {
padding: 20px 0;
}
}
</style>
<script>
import NavItemIcon from './NavItemIcon.html'
import { store } from '../_store/store'
import { on, emit } from '../_utils/eventBus'
import { mark, stop } from '../_utils/marks'
import { doubleRAF } from '../_utils/doubleRAF'
import { scrollToTop } from '../_utils/scrollToTop'
export default {
oncreate () {
let { name } = this.get()
let indicator = this.refs.indicator
on('animateNavPart1', this, ({ fromPage, toPage }) => {
if (fromPage !== name) {
return
}
mark('animateNavPart1 gBCR')
let fromRect = indicator.getBoundingClientRect()
stop('animateNavPart1 gBCR')
emit('animateNavPart2', { fromRect, fromPage, toPage })
})
on('animateNavPart2', this, ({ fromPage, fromRect, toPage }) => {
if (toPage !== name) {
return
}
mark('animateNavPart2 gBCR')
let toRect = indicator.getBoundingClientRect()
stop('animateNavPart2 gBCR')
let translateX = fromRect.left - toRect.left
let scaleX = fromRect.width / toRect.width
indicator.style.transform = `translateX(${translateX}px) scaleX(${scaleX})`
let onTransitionEnd = () => {
indicator.removeEventListener('transitionend', onTransitionEnd)
indicator.classList.remove('animate')
}
indicator.addEventListener('transitionend', onTransitionEnd)
doubleRAF(() => {
indicator.classList.add('animate')
indicator.style.transform = ''
})
})
},
store: () => store,
computed: {
selected: ({ page, name }) => page === name,
ariaLabel: ({ selected, name, label, $numberOfNotifications }) => {
let res = label
if (selected) {
res += ' (current page)'
}
if (name === 'notifications' && $numberOfNotifications) {
res += ` (${$numberOfNotifications} notification${$numberOfNotifications === 1 ? '' : 's'})`
}
return res
},
showBadge: ({ name, $hasNotifications }) => name === 'notifications' && $hasNotifications,
badgeNumber: ({ name, $numberOfNotifications }) => name === 'notifications' && $numberOfNotifications
},
methods: {
onClick (e) {
let { selected } = this.get()
if (!selected) {
return
}
if (scrollToTop(/* smooth */ true)) {
e.preventDefault()
e.stopPropagation()
}
}
},
components: {
NavItemIcon
}
}
</script>