feat(filters): add basic autocomplete component
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F40E70337AB24C9B
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@ -0,0 +1,316 @@
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<script setup lang="ts">
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import {computed, nextTick, ref, watch} from 'vue'
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const TAB = 9,
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ENTER = 13,
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ESCAPE = 27,
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ARROW_UP = 38,
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ARROW_DOWN = 40
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type state = 'unfocused' | 'focused'
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const selectedIndex = ref(0)
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const state = ref<state>('unfocused')
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const val = ref<string>('')
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const isResizing = ref(false)
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const model = defineModel<string>()
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const suggestionScrollerRef = ref<HTMLInputElement | null>(null)
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const containerRef = ref<HTMLInputElement | null>(null)
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const editorRef = ref<HTMLInputElement | null>(null)
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watch(
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() => model.value,
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newValue => {
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val.value = newValue
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},
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)
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const placeholderText = computed(() => {
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const value = (model.value || '').replace(/[\n\r\t]/gi, ' ')
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if (state.value === 'unfocused') {
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return value ? '' : props.suggestion
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}
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if (!value || !value.trim()) {
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return props.suggestion
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}
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return lookahead()
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})
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const spacerText = computed(() => {
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const value = (model.value || '').replace(/[\n\r\t]/gi, ' ')
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if (!value || !value.trim()) {
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return props.suggestion
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}
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return value
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})
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const props = withDefaults(defineProps<{
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options: string[],
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suggestion?: string,
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maxHeight?: number,
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}>(), {
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maxHeight: 200,
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})
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function addSelectedIndex(offset: number) {
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let nextIndex = Math.max(
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0,
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Math.min(selectedIndex.value + offset, props.options.length - 1),
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)
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if (!isFinite(nextIndex)) {
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nextIndex = 0
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}
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selectedIndex.value = nextIndex
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updateSuggestionScroll()
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}
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function highlight(words: string, query: string) {
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return (words || '').replace(new RegExp(query, 'i'), '<mark class="scroll-term">' + query + '</mark>')
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}
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function lookahead() {
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if (!props.options.length) {
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return model.value
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}
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const index = Math.max(0, Math.min(selectedIndex.value, props.options.length - 1))
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const match = props.options[index]
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return model.value + (match ? match.substring(model.value?.length) : '')
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}
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function updateSuggestionScroll() {
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nextTick(() => {
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const scroller = suggestionScrollerRef.value
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const selectedItem = scroller?.querySelector('.selected')
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scroller.scrollTop = selectedItem ? selectedItem.offsetTop : 0
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})
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}
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function updateScrollWindowSize() {
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if (isResizing.value) {
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return
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}
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isResizing.value = true
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nextTick(() => {
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isResizing.value = false
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const scroller = suggestionScrollerRef.value
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const parent = containerRef.value
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if (scroller) {
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const rect = parent.getBoundingClientRect()
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const pxTop = rect.top
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const pxBottom = window.innerHeight - rect.bottom
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const maxHeight = Math.max(pxTop, pxBottom, props.maxHeight)
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const isReversed = pxBottom < props.maxHeight && pxTop > pxBottom
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scroller.style.maxHeight = Math.min(isReversed ? pxTop : pxBottom, props.maxHeight) + 'px'
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scroller.parentNode.style.transform =
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isReversed ? 'translateY(-100%) translateY(-1.4rem)'
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: 'translateY(.4rem)'
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}
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})
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}
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function setState(stateName: state) {
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state.value = stateName
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if (stateName === 'unfocused') {
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editorRef.value.blur()
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} else {
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updateScrollWindowSize()
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}
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}
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function onFocusField(e) {
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setState('focused')
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}
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function onKeydown(e) {
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switch (e.keyCode || e.which) {
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case ESCAPE:
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e.preventDefault()
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setState('unfocused')
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break
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case ARROW_UP:
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e.preventDefault()
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addSelectedIndex(-1)
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break
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case ARROW_DOWN:
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e.preventDefault()
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addSelectedIndex(1)
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break
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case ENTER:
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case TAB:
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e.preventDefault()
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onSelectValue(lookahead() || model.value)
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break
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}
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}
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function onSelectValue(value) {
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model.value = value
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selectedIndex.value = 0
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setState('unfocused')
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}
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function onUpdateField(e) {
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setState('focused')
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model.value = e.currentTarget.value
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}
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</script>
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<template>
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<div class="autocomplete" ref="containerRef">
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<div class="entry-box">
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<div class="spacer">{{ spacerText }}</div>
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<div class="placeholder">{{ placeholderText }}</div>
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<textarea class="field"
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@input="onUpdateField"
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@focus="onFocusField"
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@keydown="onKeydown"
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:class="state"
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:value="val"
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ref="editorRef"></textarea>
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</div>
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<div class="suggestion-list" v-if="state === 'focused' && options.length">
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<div v-if="options && options.length" class="scroll-list">
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<div class="items" ref="suggestionScrollerRef" @keydown="onKeydown">
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<button
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v-for="(item, index) in options"
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class="item"
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@click="onSelectValue(item)"
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:class="{ selected: index === selectedIndex }"
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:key="item"
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v-html="highlight(item, val)"></button>
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</div>
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</div>
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</div>
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</div>
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</template>
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<style scoped lang="scss">
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.autocomplete {
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position: relative;
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* {
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font-size: 1rem;
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font-family: Consolas, Lucida Console, Courier New, monospace;
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}
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.entry-box {
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position: relative;
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width: 180px;
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}
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.spacer,
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.placeholder,
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.field {
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border: none;
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height: 100%;
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padding: .1rem .2rem;
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width: 100%;
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}
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.spacer {
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min-height: 1rem;
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visibility: hidden;
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}
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.placeholder {
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user-select: none;
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pointer-events: none;
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opacity: 0.4;
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z-index: 2;
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}
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.field {
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z-index: 1;
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&.focused {
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color: blue;
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}
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}
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.placeholder,
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.field {
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left: 0;
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outline: none;
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overflow: hidden;
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position: absolute;
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resize: none;
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top: 0;
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}
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.suggestion-list {
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position: absolute;
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width: 100%;
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}
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.scroll-list {
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position: absolute;
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width: 100%;
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border: solid 1px lightgray;
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box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
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}
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.items {
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margin: 0;
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max-height: 150px;
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overflow-y: auto;
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overflow-x: hidden;
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padding: 0;
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&::-webkit-scrollbar {
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width: 10px;
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}
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&::-webkit-scrollbar-thumb {
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background: #045068;
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border-radius: 20px;
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}
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&::-webkit-scrollbar-track {
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background: #dfe1e5;
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}
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}
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.item {
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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border: solid 1px transparent;
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background-color: white;
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display: block;
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width: 100%;
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text-align: left;
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&:hover {
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cursor: pointer;
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}
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&:not(.selected):hover {
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background-color: #c1dae2;
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color: black;
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}
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&.selected {
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background-color: #00aee6;
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color: white;
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}
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}
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.scroll-term {
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font-weight: bold;
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background-color: unset;
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color: unset;
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}
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}
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</style>
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