120 lines
3.9 KiB
Svelte
120 lines
3.9 KiB
Svelte
<script>
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import { t } from '../translations.svelte.js'
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import { tick } from "svelte";
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let {
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id = null,
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autofocus = false,
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getCandidates = dummyGetCandidates,
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onCommit = dummyOnCommit,
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onSelect = dummyOnSelect,
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candidate = $bindable({ display : '' })
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} = $props();
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const ignore = ['ArrowLeft','ArrowRight'];
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//let candidate = $state({ display : '' });
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let selected = $state([]);
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let candidates = $derived(getCandidates(candidate.display));
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async function dummyGetCandidates(text){
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console.warn(`getCandidates(${text}) not overridden!`);
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if (!text) return [];
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return [
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{
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display : 'candidate 1',
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explanation : 'candidates need to have a display field'
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},
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{
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display : 'candidate 2',
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additional : 'other fields are optional',
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more : 'and may be domain specific'
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},
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{ display : text }
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];
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}
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function dummyOnCommit(candidate){
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// if Enter is pressed on the input field, this method gets called with
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// either the selected candidate or
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// an anonymous object with the entered text in the display field
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console.warn(`onCommit(${JSON.stringify(candidate)}) not overridden!`);
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// if the method returns true, the field will be cleared after committing
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return true;
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}
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function dummyOnSelect(candidate){
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console.warn(`${candidate.display} selected, but onSelect not overridden!`)
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}
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async function ondblclick(evt){
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const select = evt.target;
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const idx = select.value;
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candidate = candidates[idx];
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candidates = [];
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selected = [];
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onSelect(candidate);
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}
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async function onkeyup(ev){
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if (ignore.includes(ev.key)) return;
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if (ev.key == 'ArrowDown'){
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ev.preventDefault();
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selected = selected.length < 1 ? [0] : [selected[0]+1]
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if (selected[0] >= candidates.length) selected = [0];
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return false;
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}
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if (ev.key == 'ArrowUp'){
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ev.preventDefault();
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selected = selected.length < 1 ? [-1] : [selected[0]-1]
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if (selected[0] < 0) selected = [candidates.length-1];
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return false;
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}
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if (ev.key == 'Enter'|| ev.key == 'Tab'){
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ev.preventDefault();
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if (selected.length>0) {
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candidate = candidates[selected[0]];
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candidates = [];
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selected = [];
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onSelect(candidate);
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return false;
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}
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if (ev.key == 'Enter') {
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candidates = [];
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selected = [];
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if (onCommit(candidate)) candidate = { display : '' };
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}
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return false;
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}
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if (ev.key == 'Escape'){
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ev.preventDefault();
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candidates = [];
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selected = [];
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return false;
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}
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candidate = { display : candidate.display };
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candidates = await getCandidates(candidate.display);
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if (selected>candidates.length) selected = candidates.length;
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return false;
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}
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</script>
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<style>
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span { position : relative }
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select { position : absolute; top: 30px; left: 3px; }
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select { background: black; color: orange; border: 1px solid orange; border-radius: 5px; z-index: 50; }
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option:checked { background: orange; color: black; }
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</style>
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<span>
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<input type="text" bind:value={candidate.display} {onkeyup} autofocus={autofocus} {id} />
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{#if candidates && candidates.length > 0}
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<select bind:value={selected} {ondblclick} multiple tabindex="-1">
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{#each candidates as candidate,i}
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<option value={i}>{candidate.display}</option>
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{/each}
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</select>
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{/if}
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</span> |