pinafore/routes/_components/compose/ComposeLengthGauge.html
2018-03-03 16:12:48 -08:00

48 lines
1.6 KiB
HTML

<div class="compose-box-length-gauge {{shouldAnimate ? 'should-animate' : ''}} {{overLimit ? 'over-char-limit' : ''}}"
style="transform: scaleX({{inputLengthAsFractionRoundedAfterRaf || 0}});"
aria-hidden="true"
></div>
<style>
.compose-box-length-gauge {
grid-area: gauge;
margin: 0 0 5px 5px;
height: 2px;
background: var(--main-theme-color);
transform-origin: left;
}
.compose-box-length-gauge.should-animate {
transition: transform 0.2s linear;
}
.compose-box-length-gauge.over-char-limit {
background: var(--warning-color);
}
</style>
<script>
import { CHAR_LIMIT } from '../../_static/statuses'
import { mark, stop } from '../../_utils/marks'
import { store } from '../../_store/store'
export default {
oncreate() {
// perf improvement for keyboard input latency
this.observe('inputLengthAsFractionRounded', inputLengthAsFractionRounded => {
requestAnimationFrame(() => {
mark('set inputLengthAsFractionRoundedAfterRaf')
this.set({inputLengthAsFractionRoundedAfterRaf: inputLengthAsFractionRounded})
stop('set inputLengthAsFractionRoundedAfterRaf')
requestAnimationFrame(() => this.set({shouldAnimate: true}))
})
})
},
store: () => store,
computed: {
lengthAsFraction: (length) => Math.min(CHAR_LIMIT, length) / CHAR_LIMIT,
lengthAsFractionRounded: (lengthAsFraction) => {
// We don't need to update the gauge for every decimal point, so round it to the nearest 0.02
let int = Math.round(lengthAsFraction * 100)
int -= (int % 2)
return int / 100
}
}
}
</script>