tabs: more configurable content padding options

choice between margin and padding. ngl, this feels kind of dumb, it
wasn't be problem and I don't know when it would ever be a problem.
perhaps i'll simplify or revert this later.

package.json

@@ -4,7 +4,7 @@
 		"type": "git",
 		"url": "https://gitea.auvem.com/svelte-toolkit/sui.git"
 	},
-	"version": "1.1.0",
+	"version": "1.1.2",
 	"scripts": {
 		"dev": "vite dev",
 		"build": "vite build && pnpm run prepack",

src/lib/Combobox.svelte

@@ -41,8 +41,7 @@
 	import Label from './Label.svelte';
 	import StyledRawInput from './StyledRawInput.svelte';
 	import { InputValidatorEvent, validate, type ValidatorOptions } from '@svelte-toolkit/validate';
-	import { onMount, tick, untrack, type Snippet } from 'svelte';
-	import { Portal } from '@jsrob/svelte-portal';
+	import { untrack, type Snippet } from 'svelte';
 	import { scale } from 'svelte/transition';
 	import { generateIdentifier, type IconDef } from './util';
 	import type { ClassValue, MouseEventHandler } from 'svelte/elements';
@@ -502,7 +501,6 @@
 <svelte:window onclick={handleWindowClick} />
 
 <!-- Combobox picker -->
-<Portal target="body">
 {#if open}
 	<!-- Picker container -->
 	<div
@@ -549,7 +547,6 @@
 		{/each}
 	</div>
 {/if}
-</Portal>
 
 <!-- Combobox main input container -->
 <div class={classValue}>

src/lib/Dialog.svelte

@@ -5,6 +5,8 @@
 	export interface DialogAPI {
 		/** shows an error message at the top of the dialog */
 		error: (message: RawError | null) => void;
+		/** Returns if the dialog is displaying an error */
+		hasError: () => boolean;
 		/** closes the dialog */
 		close: () => void;
 		/** opens the dialog */
@@ -39,6 +41,16 @@
 		 * changes made via this API will NOT propagate to consuming components.
 		 */
 		title: (title: string) => void;
+		/** Focuses the dialog */
+		focus: () => void;
+		/** Returns the stack index for this dialog */
+		stackIndex: () => number;
+		/**
+		 * Returns the z-index of this dialog, where each incremental stack
+		 * index increases the z-index by 100 starting from 1000. This can be
+		 * used to layer custom elements on top of and within the dialog.
+		 */
+		zIndex: () => number;
 	}
 
 	type DialogControlButton = {
@@ -64,9 +76,9 @@
 
 	/**
 	 * Stores internal state of the dialog, everything necessary to render
-	 * internal snippets.
+	 * internal and override capable snippets.
 	 */
-	type DialogState = {
+	export type DialogState = {
 		frozen: boolean;
 		loading: boolean;
 		disabled: boolean;
@@ -79,6 +91,9 @@
 	};
 
 	export { dialogCancelButton, dialogOkButton, dialogCloseButton };
+
+	/** stack of currently open dialogs by identifier */
+	let dialogStack: DialogAPI[] = $state([]);
 </script>
 
 <script lang="ts">
@@ -91,15 +106,15 @@
 	import { X } from 'phosphor-svelte';
 	import { ErrorMessage, type RawError } from './error';
 	import ErrorBox from './ErrorBox.svelte';
-	import { mergeOverrideObject } from './util';
+	import { generateIdentifier, mergeOverrideObject } from './util';
 
 	interface Props {
 		/** Bindable open state of the dialog */
 		open?: boolean;
 		/** Title of the dialog */
-		title: string | Snippet;
+		title: string | Snippet<[state: DialogState]>;
 		/** Description of the dialog, optionally rendered below the title */
-		description?: string | Snippet;
+		description?: string | Snippet<[state: DialogState]>;
 		/** Size of the dialog (default: 'sm') */
 		size?: 'sm' | 'md' | 'lg' | 'max';
 		/** Additional classes for the dialog */
@@ -107,19 +122,29 @@
 		/** Content of the dialog */
 		children?: Snippet;
 		/** Bottom controls for the dialog */
-		controls?: Snippet | DialogControls;
+		controls?: Snippet<[state: DialogState]> | DialogControls;
 		/** Sets bottom alignment of controls (default: end) */
 		controlsAlign?: 'start' | 'center' | 'end';
 		/** Top-right close control */
 		close?: Snippet | Omit<DialogControlButton, 'label'> | null;
-		/** Callback when the dialog is opened */
+		/**
+		 * Callback when the dialog is opened
+		 * @deprecated use onopenchange instead and check the open parameter
+		 */
 		onopen?: (dialog: DialogAPI) => void;
-		/** Callback when the dialog is closed */
+		/**
+		 * Callback when the dialog is closed
+		 * @deprecated use onopenchange instead and check the open parameter
+		 */
 		onclose?: (dialog: DialogAPI) => void;
+		/** Callback when the dialog open state changes */
+		onopenchange?: ({ open, dialog }: { open: boolean; dialog: DialogAPI }) => void;
 		/** If default controls are used, controls loading state of submit button */
 		loading?: boolean;
-		/** If default controls are used, freezes all interactions */
+		/** If default controls are used, freezes all interactions preventing user input */
 		frozen?: boolean;
+		/** If enabled, automatically freezes dialog when loading (default: true) */
+		autoFreeze?: boolean;
 		/** If default controls are used, disables submit button */
 		disabled?: boolean;
 	}
@@ -136,34 +161,72 @@
 		close = {},
 		onopen,
 		onclose,
+		onopenchange,
 		loading = $bindable(false),
 		frozen = $bindable(false),
+		autoFreeze = true,
 		disabled = $bindable(false)
 	}: Props = $props();
 
-	let controls = $derived(
+	const controls = $derived(
 		typeof rawControls === 'function'
 			? rawControls
 			: mergeOverrideObject(defaultDialogControls, rawControls)
 	);
 
+	const identifier = generateIdentifier('dialog');
+
+	let lastOpen = $state(open);
+	let dialogPage = $state<HTMLDivElement | null>(null);
 	let dialogContainer = $state<HTMLDivElement | null>(null);
 	let error = $state<ErrorMessage | null>(null);
+	let stackIndex = $state(-1);
+	const zIndex = $derived(1000 + stackIndex * 100);
 
-	// disable window scroll when dialog is open
-	$effect(() => {
-		if (open) {
-			document.body.style.overflow = 'hidden';
-			untrack(() => onopen?.(dialogAPI));
+	const reallyFrozen = $derived(autoFreeze ? frozen || loading : frozen);
+
+	/** handles open change */
+	const handleOpenChange = (localOpen: boolean) => {
+		if (localOpen) {
+			document.body.style.overflow = 'hidden'; // prevent scrolling
+			// focus the dialog BEFORE callbacks for accessibility & flexibility
+			dialogPage?.focus();
+			// run callbacks
+			onopen?.(dialogAPI);
+			onopenchange?.({ open: true, dialog: dialogAPI });
+			//update stack
+			dialogStack.push(dialogAPI); // add to stack of open dialogs
+			stackIndex = dialogStack.length - 1; // track index in stack for this dialog
 		} else {
-			document.body.style.overflow = '';
-			untrack(() => onclose?.(dialogAPI));
+			// update stack
+			dialogStack.pop(); // remove from stack of open dialogs
+			stackIndex = -1; // reset stack index for this dialog
+			// update focus & handle scroll locking for accessibility
+			if (dialogStack.length > 0) {
+				dialogStack[dialogStack.length - 1].focus();
+			} else {
+				document.body.style.overflow = ''; // re-enable scrolling since no dialogs are open
+			}
+			// run callbacks
+			onclose?.(dialogAPI);
+			onopenchange?.({ open: false, dialog: dialogAPI });
+		}
+	};
+
+	// deduplicate open changes
+	$effect(() => {
+		if (open !== untrack(() => lastOpen)) {
+			lastOpen = open;
+			untrack(() => {
+				handleOpenChange(open);
+			});
 		}
 	});
 
 	/** DialogAPI instance to control this dialog */
 	export const dialogAPI: DialogAPI = {
 		error: (message) => (error = ErrorMessage.from(message)),
+		hasError: () => error !== null,
 		close: () => (open = false),
 		open: () => (open = true),
 		isOpen: () => open,
@@ -177,13 +240,16 @@
 		unfreeze: () => (frozen = false),
 		isFrozen: () => frozen,
 		canContinue: () => !loading && !disabled && !frozen,
-		title: (newTitle) => (title = newTitle)
+		title: (newTitle) => (title = newTitle),
+		focus: () => dialogPage?.focus(),
+		stackIndex: () => stackIndex,
+		zIndex: () => zIndex
 	};
 
 	/** Returns the current state of the dialog */
 	export const getState = (): DialogState => {
 		return {
-			frozen,
+			frozen: reallyFrozen,
 			loading,
 			disabled,
 			api: dialogAPI
@@ -199,23 +265,31 @@
 
 {#snippet dialog()}
 	<div
+		bind:this={dialogPage}
 		class={[
-			'fixed inset-0 z-50 flex items-center-safe justify-center bg-black/50 backdrop-blur-sm',
+			'fixed inset-0 flex items-center-safe justify-center bg-black/50 backdrop-blur-sm',
 			'overflow-auto p-8',
 			classValue
 		]}
+		style={// increase z-index and decrease opacity for each nested dialog
+		`z-index: ${zIndex}`}
 		transition:fade={{ duration: 150 }}
 		onclick={(e) => {
 			const target = e.target as HTMLElement;
-			if (open && !frozen && !dialogContainer?.contains(target) && target !== dialogContainer)
+			if (open && !reallyFrozen && !dialogContainer?.contains(target) && target !== dialogContainer)
 				open = false;
 		}}
 		onkeydown={(e) => {
-			if (e.key === 'Escape' && !frozen) {
+			if (e.key === 'Escape' && !reallyFrozen) {
+				if (stackIndex === dialogStack.length - 1) {
+					// only close if this dialog is the topmost dialog
 					open = false;
 				}
+			}
 		}}
 		role="dialog"
+		aria-labelledby="{identifier}-title"
+		aria-describedby="{identifier}-description"
 		tabindex="-1"
 	>
 		<div
@@ -235,7 +309,10 @@
 		>
 			<div class="flex items-center justify-between">
 				<!-- Dialog title -->
-				<h2 class="pointer-events-none mb-2 text-lg font-medium text-black select-none">
+				<h2
+					class="pointer-events-none mb-2 text-lg font-medium text-black select-none"
+					id="{identifier}-title"
+				>
 					{@render stringOrSnippet(title)}
 				</h2>
 
@@ -254,7 +331,7 @@
 			{/if}
 
 			{#if description}
-				<p class="mb-3 leading-normal text-zinc-600">
+				<p class="mb-3 leading-normal text-zinc-600" id="{identifier}-description">
 					{@render stringOrSnippet(description)}
 				</p>
 			{/if}
@@ -270,7 +347,9 @@
 					controlsAlign === 'end' && 'justify-end'
 				]}
 			>
-				{#if controls && typeof controls === 'function'}{@render controls()}{:else if controls?.flip}
+				{#if controls && typeof controls === 'function'}{@render controls(
+						getState()
+					)}{:else if controls?.flip}
 					{#if controls.ok !== null}
 						{@render dialogOkButton(getState(), controls.ok)}
 					{/if}
@@ -300,7 +379,7 @@
 				state.api.close();
 			}
 		}}
-		disabled={state.frozen}
+		disabled={state.frozen || state.disabled}
 	>
 		{opts?.label || 'Cancel'}
 	</Button>
@@ -345,10 +424,10 @@
 	</button>
 {/snippet}
 
-{#snippet stringOrSnippet(val: string | Snippet)}
+{#snippet stringOrSnippet(val: string | Snippet<[state: DialogState]>)}
 	{#if typeof val === 'string'}
 		{val}
 	{:else}
-		{@render val()}
+		{@render val(getState())}
 	{/if}
 {/snippet}

src/lib/Tabs.svelte

@@ -23,12 +23,22 @@
 		activeIndex?: number;
 		/** Callback fired when the active tab changes */
 		onchange?: (event: { index: number; tab: TabPage }) => void;
-		/** Applies layout padding to the tab header & content areas (default: false) */
-		padded?: boolean;
+		/** Applies layout padding to the tab header (default: false) */
+		padHeader?: boolean;
+		/** Applies layout padding to the content areas (default: false) */
+		padContent?: 'padding' | 'margin' | 'none';
+		/** Additional classes applied to the outer container */
 		class?: ClassValue | null;
 	}
 
-	let { pages, activeIndex = 0, onchange, padded = false, class: classValue }: Props = $props();
+	let {
+		pages,
+		activeIndex = 0,
+		onchange,
+		padHeader = false,
+		padContent = 'none',
+		class: classValue
+	}: Props = $props();
 
 	let primaryContainerEl: HTMLDivElement;
 	let tabContainerEl: HTMLDivElement;
@@ -99,7 +109,7 @@
 		bind:this={tabContainerEl}
 		class={[
 			'border-sui-text/15 relative mb-4 flex items-center gap-5 border-b-2',
-			padded && 'px-layout'
+			padHeader && 'px-layout'
 		]}
 	>
 		{#each pages as page, i (page.title)}
@@ -134,7 +144,7 @@
 
 	{#key activeIndex}
 		<div
-			class={[padded && 'px-layout']}
+			class={[padContent === 'padding' && 'px-layout', padContent === 'margin' && 'mx-layout']}
 			in:flyX={{ direction: activeIndex > prevIndex ? 1 : -1, duration: 180, delay: 181 }}
 			out:flyX={{ direction: activeIndex > prevIndex ? -1 : 1, duration: 180 }}
 			onoutrostart={lockHeight}

src/lib/index.ts

@@ -10,6 +10,7 @@ export {
 	default as Dialog,
 	type DialogAPI,
 	type DialogControls,
+	type DialogState,
 	dialogCancelButton,
 	dialogCloseButton,
 	dialogOkButton

src/routes/+page.svelte

@@ -35,8 +35,7 @@
 	import { createLazyComponent, type ComboboxOption, type Option } from '$lib';
 	import Tabs from '$lib/Tabs.svelte';
 	import { Time } from '@internationalized/date';
-	import { onMount, type Component } from 'svelte';
-	import ErrorBox from '$lib/ErrorBox.svelte';
+	import { onMount } from 'svelte';
 	import TextareaInput from '$lib/TextareaInput.svelte';
 	import DurationInput, { formatDuration } from '$lib/DurationInput.svelte';
 	import Banner from '$lib/Banner.svelte';
@@ -60,6 +59,7 @@
 	let dateInputValue = $state<CalendarDate | null>(null);
 	let checkboxValue = $state<CheckboxState>('indeterminate');
 	let dialogOpen = $state(false);
+	let nestedDialogOpen = $state(false);
 	let scrollableDialogOpen = $state(false);
 	let toggleOptions: Option[] = $state([
 		'item one',
@@ -218,7 +218,7 @@
 			label="Lazy combobox"
 			placeholder="Choose..."
 			options={lazyOptions}
-			lazy={'always'}
+			lazy="always"
 			onlazy={async () => {
 				await new Promise((resolve) => setTimeout(resolve, 2500));
 				lazyOptions = [
@@ -537,15 +537,6 @@
 	bind:open={dialogOpen}
 	title="Dialog Title"
 	size="sm"
-	controls={{
-		ok: {
-			action: (dialog) => {
-				dialog.close();
-				alert('Dialog submitted!');
-			}
-		},
-		cancel: null
-	}}
 	onopen={(dialog) => {
 		dialog.error('Example error message!');
 		dialog.loading();
@@ -554,7 +545,27 @@
 		}, 2000);
 	}}
 >
+	{#snippet controls(state)}
+		<Button onclick={() => state.api.close()}>Cancel</Button>
+		<Button
+			onclick={() => {
+				state.api.close();
+				alert('Dialog submitted!');
+			}}
+			loading={state.loading}
+		>
+			Submit
+		</Button>
+	{/snippet}
+
 	<p>This is a dialog content area.</p>
+
+	<Button onclick={() => (nestedDialogOpen = true)}>Open Nested Dialog</Button>
+</Dialog>
+
+<!-- Nested Dialog Demo -->
+<Dialog bind:open={nestedDialogOpen} title="Nested Dialog" size="sm">
+	<p>This is a nested dialog content area.</p>
 </Dialog>
 
 <!-- Scrollable Dialog Demo -->