106 lines
2.5 KiB
Svelte
106 lines
2.5 KiB
Svelte
<!--
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Copyright: Ankitects Pty Ltd and contributors
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License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
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-->
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<script lang="typescript">
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import Dropdown from "bootstrap/js/dist/dropdown";
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import { setContext, onDestroy } from "svelte";
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import { dropdownKey } from "./context-keys";
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export let autoOpen = false;
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export let autoClose: boolean | "inside" | "outside" = true;
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export let toggleOpen = true;
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export let drop: "down" | "up" = "down";
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export let align: "start" | "end" | "auto" = "auto";
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let placement: string;
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$: {
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let blockPlacement: string;
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switch (drop) {
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case "down":
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blockPlacement = "bottom";
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break;
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case "up":
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blockPlacement = "top";
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break;
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}
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let inlinePlacement: string;
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switch (align) {
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case "start":
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case "end":
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inlinePlacement = `-${align}`;
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break;
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default:
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inlinePlacement = "";
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break;
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}
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placement = `${blockPlacement}${inlinePlacement}`;
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}
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$: dropClass = `drop${drop}`;
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setContext(dropdownKey, {
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dropdown: true,
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"data-bs-toggle": "dropdown",
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});
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let dropdown: Dropdown;
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let api: Dropdown & { isVisible: () => boolean };
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function isVisible() {
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return (dropdown as any)._menu
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? (dropdown as any)._menu.classList.contains("show")
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: false;
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}
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const noop = () => {};
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function createDropdown(toggle: HTMLElement): Dropdown {
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/* avoid focusing element toggle on menu activation */
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toggle.focus = noop;
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if (!toggleOpen) {
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/* do not open on clicking toggle */
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toggle.addEventListener = noop;
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}
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dropdown = new Dropdown(toggle, {
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autoClose,
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popperConfig: { placement },
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} as any);
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if (autoOpen) {
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dropdown.show();
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}
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api = {
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show: dropdown.show.bind(dropdown),
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toggle: dropdown.toggle.bind(dropdown),
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hide: dropdown.hide.bind(dropdown),
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update: dropdown.update.bind(dropdown),
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dispose: dropdown.dispose.bind(dropdown),
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isVisible,
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};
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return api;
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}
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onDestroy(() => dropdown?.dispose());
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</script>
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<div class={dropClass}>
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<slot {createDropdown} dropdownObject={api} />
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</div>
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<style lang="scss">
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div {
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display: contents;
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}
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</style>
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