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This commit is contained in:
Timothy Jaeryang Baek
2026-03-15 21:29:56 -05:00
parent 753589e51c
commit 07e650c787
5 changed files with 349 additions and 170 deletions
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src/lib/components/common/Dropdown.svelte
+126 -39
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@@ -1,51 +1,138 @@
<script lang="ts">
import { DropdownMenu } from 'bits-ui';
import { createEventDispatcher, getContext } from 'svelte';
const i18n = getContext('i18n');
import { flyAndScale } from '$lib/utils/transitions';
import { tick } from 'svelte';
/** Whether the dropdown is open */
export let show = false;
/** Side to open on: 'bottom' | 'top' */
export let side = 'bottom';
/** Alignment: 'start' | 'end' */
export let align = 'start';
/** Close when clicking outside */
export let closeOnOutsideClick = true;
const dispatch = createEventDispatcher();
/** Called when open/close state changes */
export let onOpenChange: (state: boolean) => void = () => {};
/** CSS classes for the dropdown content container */
export let contentClass = '';
/** Side offset in px */
export let sideOffset = 4;
let triggerEl;
let contentEl;
/** Svelte action: moves the node to document.body */
function portal(node) {
document.body.appendChild(node);
return {
destroy() {
if (node.parentNode) {
node.parentNode.removeChild(node);
}
}
};
}
/** Svelte action: captures the first child element as the trigger reference */
function trigger(node) {
triggerEl = node.firstElementChild || node;
node.addEventListener('click', toggleOpen);
return {
destroy() {
node.removeEventListener('click', toggleOpen);
}
};
}
function positionContent() {
if (!triggerEl || !contentEl) return;
const rect = triggerEl.getBoundingClientRect();
contentEl.style.position = 'fixed';
contentEl.style.zIndex = '9999';
const contentHeight = contentEl.offsetHeight || 0;
const spaceBelow = window.innerHeight - rect.bottom - sideOffset;
const spaceAbove = rect.top - sideOffset;
// Auto-flip: prefer the requested side, but flip if not enough space
let openAbove = side === 'top';
if (side === 'bottom' && spaceBelow < contentHeight && spaceAbove > spaceBelow) {
openAbove = true;
} else if (side === 'top' && spaceAbove < contentHeight && spaceBelow > spaceAbove) {
openAbove = false;
}
if (openAbove) {
contentEl.style.bottom = `${window.innerHeight - rect.top + sideOffset}px`;
contentEl.style.top = 'auto';
} else {
contentEl.style.top = `${rect.bottom + sideOffset}px`;
contentEl.style.bottom = 'auto';
}
if (align === 'end') {
contentEl.style.right = `${window.innerWidth - rect.right}px`;
contentEl.style.left = 'auto';
} else {
contentEl.style.left = `${rect.left}px`;
contentEl.style.right = 'auto';
}
}
async function toggleOpen() {
show = !show;
onOpenChange(show);
if (show) {
await tick();
positionContent();
// Re-check after transition renders real dimensions
setTimeout(positionContent, 50);
}
}
function handleWindowClick(event) {
if (!show || !closeOnOutsideClick) return;
if (triggerEl?.contains(event.target)) return;
if (contentEl?.contains(event.target)) return;
show = false;
onOpenChange(false);
}
function handleKeydown(event) {
if (event.key === 'Escape' && show) {
show = false;
onOpenChange(false);
}
}
/** Close the dropdown programmatically */
export function close() {
show = false;
onOpenChange(false);
}
</script>
<DropdownMenu.Root
bind:open={show}
closeFocus={false}
{closeOnOutsideClick}
onOpenChange={(state) => {
dispatch('change', state);
}}
typeahead={false}
>
<DropdownMenu.Trigger>
<slot />
</DropdownMenu.Trigger>
<svelte:window on:click={handleWindowClick} on:keydown={handleKeydown} on:scroll|capture={positionContent} on:resize={positionContent} />
<slot name="content">
<DropdownMenu.Content
class="w-full max-w-[130px] rounded-lg p-1 border border-gray-900 z-50 bg-gray-850 text-white"
sideOffset={8}
{side}
{align}
transition={flyAndScale}
>
<DropdownMenu.Item class="select-none flex items-center px-3 py-2 text-sm font-medium">
<div class="flex items-center">{$i18n.t('Profile')}</div>
</DropdownMenu.Item>
<!-- svelte-ignore a11y-click-events-have-key-events -->
<!-- svelte-ignore a11y-no-static-element-interactions -->
<span use:trigger style="display: contents;">
<slot />
</span>
<DropdownMenu.Item class="select-none flex items-center px-3 py-2 text-sm font-medium">
<div class="flex items-center">{$i18n.t('Profile')}</div>
</DropdownMenu.Item>
<DropdownMenu.Item class="select-none flex items-center px-3 py-2 text-sm font-medium">
<div class="flex items-center">{$i18n.t('Profile')}</div>
</DropdownMenu.Item>
</DropdownMenu.Content>
</slot>
</DropdownMenu.Root>
{#if show}
<div
use:portal
bind:this={contentEl}
class={contentClass}
transition:flyAndScale
>
<slot name="content" />
</div>
{/if}
src/lib/components/common/DropdownSub.svelte
+113
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@@ -0,0 +1,113 @@
<script lang="ts">
import { flyAndScale } from '$lib/utils/transitions';
import { tick } from 'svelte';
/** CSS classes for the sub-content container */
export let contentClass = 'select-none rounded-2xl p-1 z-50 bg-white dark:bg-gray-850 dark:text-white shadow-lg border border-gray-100 dark:border-gray-800';
/** Max width in px, enforced at the component level */
export let maxWidth = 200;
/** Side offset from the trigger in px */
export let sideOffset = 8;
let open = false;
let triggerEl;
let contentEl;
function positionContent() {
if (!triggerEl || !contentEl) return;
const rect = triggerEl.getBoundingClientRect();
contentEl.style.position = 'fixed';
contentEl.style.zIndex = '99999';
// Position to the right of the trigger
const rightSpace = window.innerWidth - rect.right;
const contentWidth = contentEl.offsetWidth || 200;
if (rightSpace >= contentWidth + sideOffset) {
// Open to the right
contentEl.style.left = `${rect.right + sideOffset}px`;
contentEl.style.right = 'auto';
} else {
// Open to the left
contentEl.style.right = `${window.innerWidth - rect.left + sideOffset}px`;
contentEl.style.left = 'auto';
}
// Vertical positioning with robust bounds clamping (shift method)
const contentHeight = contentEl.offsetHeight || 0;
let top = rect.top;
// If it overflows the bottom edge
if (top + contentHeight + 16 > window.innerHeight) {
top = window.innerHeight - contentHeight - 16;
}
// If shifting it up causes it to overflow the top edge, cap it at 16px
if (top < 16) {
top = 16;
}
contentEl.style.top = `${top}px`;
}
async function handleMouseEnter() {
open = true;
await tick();
positionContent();
// Re-position after transition starts rendering real dimensions
setTimeout(positionContent, 50);
}
function handleMouseLeave(event) {
// Don't close if moving to the sub-content
if (contentEl?.contains(event.relatedTarget)) return;
if (triggerEl?.contains(event.relatedTarget)) return;
open = false;
}
function handleContentMouseLeave(event) {
if (triggerEl?.contains(event.relatedTarget)) return;
if (contentEl?.contains(event.relatedTarget)) return;
open = false;
}
function portal(node) {
document.body.appendChild(node);
return {
destroy() {
if (node.parentNode) {
node.parentNode.removeChild(node);
}
}
};
}
</script>
<svelte:window on:scroll|capture={positionContent} on:resize={positionContent} />
<!-- svelte-ignore a11y-no-static-element-interactions -->
<div
bind:this={triggerEl}
class="w-full"
on:mouseenter={handleMouseEnter}
on:mouseleave={handleMouseLeave}
>
<slot name="trigger" />
</div>
{#if open}
<!-- svelte-ignore a11y-no-static-element-interactions -->
<div
use:portal
bind:this={contentEl}
class={contentClass}
style="max-width: {maxWidth}px;"
transition:flyAndScale
on:mouseleave={handleContentMouseLeave}
>
<slot />
</div>
{/if}