feat(filters): add basic autocomplete component
This commit is contained in:
kolaente
parent
35487093c6
commit
2daecbc2bc
316
frontend/src/components/input/Autocomplete.vue
Normal file
316
frontend/src/components/input/Autocomplete.vue
Normal file
@ -0,0 +1,316 @@
|
||||
<script setup lang="ts">
|
||||
import {computed, nextTick, ref, watch} from 'vue'
|
||||
|
||||
const TAB = 9,
|
||||
ENTER = 13,
|
||||
ESCAPE = 27,
|
||||
ARROW_UP = 38,
|
||||
ARROW_DOWN = 40
|
||||
|
||||
type state = 'unfocused' | 'focused'
|
||||
|
||||
const selectedIndex = ref(0)
|
||||
const state = ref<state>('unfocused')
|
||||
const val = ref<string>('')
|
||||
const isResizing = ref(false)
|
||||
const model = defineModel<string>()
|
||||
|
||||
const suggestionScrollerRef = ref<HTMLInputElement | null>(null)
|
||||
const containerRef = ref<HTMLInputElement | null>(null)
|
||||
const editorRef = ref<HTMLInputElement | null>(null)
|
||||
|
||||
watch(
|
||||
() => model.value,
|
||||
newValue => {
|
||||
val.value = newValue
|
||||
},
|
||||
)
|
||||
|
||||
const placeholderText = computed(() => {
|
||||
const value = (model.value || '').replace(/[\n\r\t]/gi, ' ')
|
||||
|
||||
if (state.value === 'unfocused') {
|
||||
return value ? '' : props.suggestion
|
||||
}
|
||||
|
||||
if (!value || !value.trim()) {
|
||||
return props.suggestion
|
||||
}
|
||||
|
||||
return lookahead()
|
||||
})
|
||||
|
||||
const spacerText = computed(() => {
|
||||
const value = (model.value || '').replace(/[\n\r\t]/gi, ' ')
|
||||
|
||||
if (!value || !value.trim()) {
|
||||
return props.suggestion
|
||||
}
|
||||
|
||||
return value
|
||||
})
|
||||
|
||||
const props = withDefaults(defineProps<{
|
||||
options: string[],
|
||||
suggestion?: string,
|
||||
maxHeight?: number,
|
||||
}>(), {
|
||||
maxHeight: 200,
|
||||
})
|
||||
function addSelectedIndex(offset: number) {
|
||||
let nextIndex = Math.max(
|
||||
0,
|
||||
Math.min(selectedIndex.value + offset, props.options.length - 1),
|
||||
)
|
||||
if (!isFinite(nextIndex)) {
|
||||
nextIndex = 0
|
||||
}
|
||||
selectedIndex.value = nextIndex
|
||||
updateSuggestionScroll()
|
||||
}
|
||||
|
||||
function highlight(words: string, query: string) {
|
||||
return (words || '').replace(new RegExp(query, 'i'), '<mark class="scroll-term">' + query + '</mark>')
|
||||
}
|
||||
|
||||
function lookahead() {
|
||||
if (!props.options.length) {
|
||||
return model.value
|
||||
}
|
||||
const index = Math.max(0, Math.min(selectedIndex.value, props.options.length - 1))
|
||||
const match = props.options[index]
|
||||
return model.value + (match ? match.substring(model.value?.length) : '')
|
||||
}
|
||||
|
||||
function updateSuggestionScroll() {
|
||||
nextTick(() => {
|
||||
const scroller = suggestionScrollerRef.value
|
||||
const selectedItem = scroller?.querySelector('.selected')
|
||||
scroller.scrollTop = selectedItem ? selectedItem.offsetTop : 0
|
||||
})
|
||||
}
|
||||
|
||||
function updateScrollWindowSize() {
|
||||
if (isResizing.value) {
|
||||
return
|
||||
}
|
||||
|
||||
isResizing.value = true
|
||||
|
||||
nextTick(() => {
|
||||
isResizing.value = false
|
||||
|
||||
const scroller = suggestionScrollerRef.value
|
||||
const parent = containerRef.value
|
||||
if (scroller) {
|
||||
const rect = parent.getBoundingClientRect()
|
||||
const pxTop = rect.top
|
||||
const pxBottom = window.innerHeight - rect.bottom
|
||||
const maxHeight = Math.max(pxTop, pxBottom, props.maxHeight)
|
||||
const isReversed = pxBottom < props.maxHeight && pxTop > pxBottom
|
||||
scroller.style.maxHeight = Math.min(isReversed ? pxTop : pxBottom, props.maxHeight) + 'px'
|
||||
scroller.parentNode.style.transform =
|
||||
isReversed ? 'translateY(-100%) translateY(-1.4rem)'
|
||||
: 'translateY(.4rem)'
|
||||
}
|
||||
})
|
||||
}
|
||||
|
||||
function setState(stateName: state) {
|
||||
state.value = stateName
|
||||
if (stateName === 'unfocused') {
|
||||
editorRef.value.blur()
|
||||
} else {
|
||||
updateScrollWindowSize()
|
||||
}
|
||||
}
|
||||
|
||||
function onFocusField(e) {
|
||||
setState('focused')
|
||||
}
|
||||
|
||||
function onKeydown(e) {
|
||||
switch (e.keyCode || e.which) {
|
||||
case ESCAPE:
|
||||
e.preventDefault()
|
||||
setState('unfocused')
|
||||
break
|
||||
case ARROW_UP:
|
||||
e.preventDefault()
|
||||
addSelectedIndex(-1)
|
||||
break
|
||||
case ARROW_DOWN:
|
||||
e.preventDefault()
|
||||
addSelectedIndex(1)
|
||||
break
|
||||
case ENTER:
|
||||
case TAB:
|
||||
e.preventDefault()
|
||||
onSelectValue(lookahead() || model.value)
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
function onSelectValue(value) {
|
||||
model.value = value
|
||||
selectedIndex.value = 0
|
||||
setState('unfocused')
|
||||
}
|
||||
|
||||
function onUpdateField(e) {
|
||||
setState('focused')
|
||||
model.value = e.currentTarget.value
|
||||
}
|
||||
|
||||
|
||||
</script>
|
||||
|
||||
<template>
|
||||
<div class="autocomplete" ref="containerRef">
|
||||
<div class="entry-box">
|
||||
<div class="spacer">{{ spacerText }}</div>
|
||||
<div class="placeholder">{{ placeholderText }}</div>
|
||||
<textarea class="field"
|
||||
@input="onUpdateField"
|
||||
@focus="onFocusField"
|
||||
@keydown="onKeydown"
|
||||
:class="state"
|
||||
:value="val"
|
||||
ref="editorRef"></textarea>
|
||||
</div>
|
||||
<div class="suggestion-list" v-if="state === 'focused' && options.length">
|
||||
<div v-if="options && options.length" class="scroll-list">
|
||||
<div class="items" ref="suggestionScrollerRef" @keydown="onKeydown">
|
||||
<button
|
||||
v-for="(item, index) in options"
|
||||
class="item"
|
||||
@click="onSelectValue(item)"
|
||||
:class="{ selected: index === selectedIndex }"
|
||||
:key="item"
|
||||
v-html="highlight(item, val)"></button>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
</template>
|
||||
|
||||
<style scoped lang="scss">
|
||||
|
||||
.autocomplete {
|
||||
position: relative;
|
||||
|
||||
* {
|
||||
font-size: 1rem;
|
||||
font-family: Consolas, Lucida Console, Courier New, monospace;
|
||||
}
|
||||
|
||||
.entry-box {
|
||||
position: relative;
|
||||
width: 180px;
|
||||
}
|
||||
|
||||
.spacer,
|
||||
.placeholder,
|
||||
.field {
|
||||
border: none;
|
||||
height: 100%;
|
||||
padding: .1rem .2rem;
|
||||
width: 100%;
|
||||
}
|
||||
|
||||
.spacer {
|
||||
min-height: 1rem;
|
||||
visibility: hidden;
|
||||
}
|
||||
|
||||
.placeholder {
|
||||
user-select: none;
|
||||
pointer-events: none;
|
||||
opacity: 0.4;
|
||||
z-index: 2;
|
||||
}
|
||||
|
||||
.field {
|
||||
z-index: 1;
|
||||
|
||||
&.focused {
|
||||
color: blue;
|
||||
}
|
||||
}
|
||||
|
||||
.placeholder,
|
||||
.field {
|
||||
left: 0;
|
||||
outline: none;
|
||||
overflow: hidden;
|
||||
position: absolute;
|
||||
resize: none;
|
||||
top: 0;
|
||||
}
|
||||
|
||||
.suggestion-list {
|
||||
position: absolute;
|
||||
width: 100%;
|
||||
}
|
||||
|
||||
.scroll-list {
|
||||
position: absolute;
|
||||
width: 100%;
|
||||
border: solid 1px lightgray;
|
||||
box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
|
||||
}
|
||||
|
||||
.items {
|
||||
margin: 0;
|
||||
max-height: 150px;
|
||||
overflow-y: auto;
|
||||
overflow-x: hidden;
|
||||
padding: 0;
|
||||
|
||||
&::-webkit-scrollbar {
|
||||
width: 10px;
|
||||
}
|
||||
|
||||
&::-webkit-scrollbar-thumb {
|
||||
background: #045068;
|
||||
border-radius: 20px;
|
||||
}
|
||||
|
||||
&::-webkit-scrollbar-track {
|
||||
background: #dfe1e5;
|
||||
}
|
||||
}
|
||||
|
||||
.item {
|
||||
white-space: nowrap;
|
||||
overflow: hidden;
|
||||
text-overflow: ellipsis;
|
||||
border: solid 1px transparent;
|
||||
background-color: white;
|
||||
display: block;
|
||||
width: 100%;
|
||||
text-align: left;
|
||||
|
||||
&:hover {
|
||||
cursor: pointer;
|
||||
}
|
||||
|
||||
&:not(.selected):hover {
|
||||
background-color: #c1dae2;
|
||||
color: black;
|
||||
}
|
||||
|
||||
&.selected {
|
||||
background-color: #00aee6;
|
||||
color: white;
|
||||
}
|
||||
}
|
||||
|
||||
.scroll-term {
|
||||
font-weight: bold;
|
||||
background-color: unset;
|
||||
color: unset;
|
||||
}
|
||||
}
|
||||
|
||||
</style>
|
||||
Loading…
x
Reference in New Issue
Block a user