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87a665c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | <script lang="ts">
import { flyAndScale } from '$lib/utils/transitions';
import { tick } from 'svelte';
/** Whether the dropdown is open */
export let show = false;
/** Side to open on: 'bottom' | 'top' */
export let side = 'bottom';
/** Alignment: 'start' | 'end' */
export let align = 'start';
/** Close when clicking outside */
export let closeOnOutsideClick = true;
/** Called when open/close state changes */
export let onOpenChange: (state: boolean) => void = () => {};
/** CSS classes for the dropdown content container */
export let contentClass = '';
/** Side offset in px */
export let sideOffset = 4;
let triggerEl;
let contentEl;
/** Svelte action: moves the node to document.body */
function portal(node) {
document.body.appendChild(node);
return {
destroy() {
if (node.parentNode) {
node.parentNode.removeChild(node);
}
}
};
}
/** Svelte action: captures the first child element as the trigger reference */
function trigger(node) {
triggerEl = node.firstElementChild || node;
function handleClick(e) {
e.preventDefault();
toggleOpen();
}
node.addEventListener('click', handleClick);
return {
destroy() {
node.removeEventListener('click', handleClick);
}
};
}
function positionContent() {
if (!triggerEl || !contentEl) return;
const rect = triggerEl.getBoundingClientRect();
contentEl.style.position = 'fixed';
contentEl.style.zIndex = '9999';
const contentHeight = contentEl.offsetHeight || 0;
const spaceBelow = window.innerHeight - rect.bottom - sideOffset;
const spaceAbove = rect.top - sideOffset;
// Auto-flip: prefer the requested side, but flip if not enough space
let openAbove = side === 'top';
if (side === 'bottom' && spaceBelow < contentHeight && spaceAbove > spaceBelow) {
openAbove = true;
} else if (side === 'top' && spaceAbove < contentHeight && spaceBelow > spaceAbove) {
openAbove = false;
}
if (openAbove) {
contentEl.style.bottom = `${window.innerHeight - rect.top + sideOffset}px`;
contentEl.style.top = 'auto';
} else {
contentEl.style.top = `${rect.bottom + sideOffset}px`;
contentEl.style.bottom = 'auto';
}
if (align === 'end') {
let right = window.innerWidth - rect.right;
// Shift if overflowing left edge
const contentWidth = contentEl.offsetWidth || 0;
if (right + contentWidth > window.innerWidth) {
right = window.innerWidth - contentWidth - 16;
}
contentEl.style.right = `${Math.max(16, right)}px`;
contentEl.style.left = 'auto';
} else {
let left = rect.left;
// Shift if overflowing right edge
const contentWidth = contentEl.offsetWidth || 0;
if (left + contentWidth + 16 > window.innerWidth) {
left = window.innerWidth - contentWidth - 16;
}
contentEl.style.left = `${Math.max(16, 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);
}
}
// React to external show changes (e.g. bind:show toggled by parent component)
$: if (show) {
tick().then(() => {
positionContent();
setTimeout(positionContent, 50);
});
}
function handleWindowPointerDown(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);
}
import { onMount, onDestroy } from 'svelte';
let onPointerDown;
onMount(() => {
onPointerDown = (e) => handleWindowPointerDown(e);
document.addEventListener('pointerdown', onPointerDown, true);
});
onDestroy(() => {
if (onPointerDown) {
document.removeEventListener('pointerdown', onPointerDown, true);
}
});
</script>
<svelte:window
on:keydown={handleKeydown}
on:scroll|capture={positionContent}
on:resize={positionContent}
/>
<!-- svelte-ignore a11y-click-events-have-key-events -->
<!-- svelte-ignore a11y-no-static-element-interactions -->
<span use:trigger style="display: contents; cursor: pointer;">
<slot />
</span>
{#if show}
<!-- svelte-ignore a11y-click-events-have-key-events -->
<!-- svelte-ignore a11y-no-static-element-interactions -->
<div
use:portal
bind:this={contentEl}
class={contentClass}
transition:flyAndScale
on:click={(e) => e.stopPropagation()}
on:pointerdown={(e) => e.stopPropagation()}
>
<slot name="content" />
</div>
{/if}
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