pinafore/routes/_components/compose/ComposeLengthGauge.html

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