pinafore/routes/_components/compose/ComposeLengthIndicator.html
2018-04-21 09:56:45 -07:00

50 lines
1.5 KiB
HTML

<span class="compose-box-length {{overLimit ? 'over-char-limit' : ''}}"
aria-label="{{lengthLabel}}">
{{lengthToDisplayDeferred || '0'}}
</span>
<style>
.compose-box-length {
grid-area: length;
justify-self: right;
color: var(--main-theme-color);
font-size: 1.3em;
align-self: center;
}
.compose-box-length.over-char-limit {
color: var(--warning-color);
}
</style>
<script>
import { CHAR_LIMIT } from '../../_static/statuses'
import { mark, stop } from '../../_utils/marks'
import { store } from '../../_store/store'
import { scheduleIdleTask } from '../../_utils/scheduleIdleTask'
export default {
oncreate () {
let { lengthToDisplay } = this.get()
this.set({lengthToDisplayDeferred: lengthToDisplay})
// perf improvement for keyboard input latency
this.observe('lengthToDisplay', () => {
scheduleIdleTask(() => {
mark('set lengthToDisplayDeferred')
let { lengthToDisplay } = this.get() || {} // // https://github.com/sveltejs/svelte/issues/1354
this.set({lengthToDisplayDeferred: lengthToDisplay})
stop('set lengthToDisplayDeferred')
})
}, {init: false})
},
store: () => store,
computed: {
lengthToDisplay: (length) => CHAR_LIMIT - length,
lengthLabel: (overLimit, lengthToDisplayDeferred) => {
if (overLimit) {
return `${lengthToDisplayDeferred} characters over limit`
} else {
return `${lengthToDisplayDeferred} characters remaining`
}
}
}
}
</script>