dialog: title & control customization with snippets, fixed callbacks

src/lib/Dialog.svelte

@@ -42,8 +42,11 @@
 	}
 
 	type DialogControlButton = {
+		/** Label for the button */
 		label?: string;
+		/** Additional classes to apply to the button */
 		class?: ClassValue;
+		/** Callback when the button is pressed */
 		action?: (dialog: DialogAPI) => void;
 	};
 
@@ -51,25 +54,36 @@
 	 * Configures the default dialog controls.
 	 */
 	export type DialogControls = {
+		/** Options for the bottom cancel button */
 		cancel?: DialogControlButton | null;
+		/** Options for the bottom submit button */
 		ok?: DialogControlButton | null;
-		close?: Omit<DialogControlButton, 'label'> | null;
+		/** Inverts the order of the buttons */
+		flip?: boolean;
+	};
+
+	/**
+	 * Stores internal state of the dialog, everything necessary to render
+	 * internal snippets.
+	 */
+	type DialogState = {
+		frozen: boolean;
+		loading: boolean;
+		disabled: boolean;
+		api: DialogAPI;
 	};
 
 	const defaultDialogControls: DialogControls = {
-		cancel: {
+		cancel: { label: 'Cancel' },
-			label: 'Cancel'
+		ok: { label: 'OK' }
-		},
-		ok: {
-			label: 'OK'
-		},
-		close: {}
 	};
+
+	export { dialogCancelButton, dialogOkButton, dialogCloseButton };
 </script>
 
 <script lang="ts">
 	import { Portal } from '@jsrob/svelte-portal';
-	import { type Snippet } from 'svelte';
+	import { untrack, type Snippet } from 'svelte';
 	import type { ClassValue } from 'svelte/elements';
 	import { fade } from 'svelte/transition';
 	import { flyAndScale } from './transition';
@@ -80,17 +94,33 @@
 	import { mergeOverrideObject } from './util';
 
 	interface Props {
+		/** Bindable open state of the dialog */
 		open?: boolean;
-		title: string;
+		/** Title of the dialog */
-		description?: string;
+		title: string | Snippet;
+		/** Description of the dialog, optionally rendered below the title */
+		description?: string | Snippet;
+		/** Size of the dialog (default: 'sm') */
 		size?: 'sm' | 'md' | 'lg' | 'max';
+		/** Additional classes for the dialog */
 		class?: ClassValue;
+		/** Content of the dialog */
 		children?: Snippet;
+		/** Bottom controls for the dialog */
 		controls?: Snippet | 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 */
 		onopen?: (dialog: DialogAPI) => void;
+		/** Callback when the dialog is closed */
 		onclose?: (dialog: DialogAPI) => void;
+		/** If default controls are used, controls loading state of submit button */
 		loading?: boolean;
+		/** If default controls are used, freezes all interactions */
 		frozen?: boolean;
+		/** If default controls are used, disables submit button */
 		disabled?: boolean;
 	}
 
@@ -102,6 +132,8 @@
 		class: classValue,
 		children,
 		controls: rawControls = defaultDialogControls,
+		controlsAlign = 'end',
+		close = {},
 		onopen,
 		onclose,
 		loading = $bindable(false),
@@ -122,14 +154,15 @@
 	$effect(() => {
 		if (open) {
 			document.body.style.overflow = 'hidden';
-			onopen?.(dialogAPI);
+			untrack(() => onopen?.(dialogAPI));
 		} else {
 			document.body.style.overflow = '';
-			onclose?.(dialogAPI);
+			untrack(() => onclose?.(dialogAPI));
 		}
 	});
 
-	const dialogAPI: DialogAPI = {
+	/** DialogAPI instance to control this dialog */
+	export const dialogAPI: DialogAPI = {
 		error: (message) => (error = ErrorMessage.from(message)),
 		close: () => (open = false),
 		open: () => (open = true),
@@ -146,6 +179,16 @@
 		canContinue: () => !loading && !disabled && !frozen,
 		title: (newTitle) => (title = newTitle)
 	};
+
+	/** Returns the current state of the dialog */
+	export const getState = (): DialogState => {
+		return {
+			frozen,
+			loading,
+			disabled,
+			api: dialogAPI
+		};
+	};
 </script>
 
 <Portal target="body">
@@ -190,7 +233,21 @@
 				start: 0.96
 			}}
 		>
-			<h2 class="pointer-events-none mb-2 text-lg font-medium text-black select-none">{title}</h2>
+			<div class="flex items-center justify-between">
+				<!-- Dialog title -->
+				<h2 class="pointer-events-none mb-2 text-lg font-medium text-black select-none">
+					{@render stringOrSnippet(title)}
+				</h2>
+
+				<!-- Close Button -->
+				{#if close !== null}
+					{#if typeof close === 'function'}
+						{@render close()}
+					{:else}
+						{@render dialogCloseButton(getState(), close)}
+					{/if}
+				{/if}
+			</div>
 
 			{#if error}
 				<ErrorBox {error} />
@@ -198,68 +255,102 @@
 
 			{#if description}
 				<p class="mb-3 leading-normal text-zinc-600">
-					{description}
+					{@render stringOrSnippet(description)}
 				</p>
 			{/if}
 
 			{#if children}{@render children()}{:else}Dialog is empty{/if}
 
 			<!-- Dialog Controls -->
-			<div class="mt-6 flex justify-end gap-4">
+			<div
-				{#if controls && typeof controls === 'function'}{@render controls()}{:else}
+				class={[
-					{#if controls.cancel !== null}
+					'mt-6 flex gap-4',
-						<Button
+					controlsAlign === 'start' && 'justify-start',
-							class={controls?.cancel?.class}
+					controlsAlign === 'center' && 'justify-center',
-							onclick={() => {
+					controlsAlign === 'end' && 'justify-end'
-								if (controls?.cancel?.action) {
+				]}
-									controls.cancel.action(dialogAPI);
-								} else if (!frozen) {
-									open = false;
-								}
-							}}
-							disabled={frozen}
 			>
-							{controls?.cancel?.label || 'Cancel'}
+				{#if controls && typeof controls === 'function'}{@render controls()}{:else}
-						</Button>
+					{#if controls.ok !== null}
+						{@render dialogOkButton(getState(), controls.ok)}
+					{/if}
+					{#if controls?.flip}
+						{#if controls.cancel !== null}
+							{@render dialogCancelButton(getState(), controls.cancel)}
+						{/if}
+					{:else}
+						{#if controls.cancel !== null}
+							{@render dialogCancelButton(getState(), controls.cancel)}
 						{/if}
 						{#if controls.ok !== null}
-						<Button
+							{@render dialogOkButton(getState(), controls.ok)}
-							class={controls?.ok?.class}
+						{/if}
-							onclick={() => {
-								if (controls?.ok?.action) {
-									controls.ok.action(dialogAPI);
-								} else if (!frozen && !loading && !disabled) {
-									open = false;
-								}
-							}}
-							disabled={frozen || loading || disabled}
-							{loading}
-						>
-							{controls?.ok?.label || 'OK'}
-						</Button>
 					{/if}
 				{/if}
 			</div>
-
-			<!-- Close Button -->
-			{#if typeof controls === 'function' || controls?.close !== null}
-				<button
-					type="button"
-					aria-label="close"
-					class="absolute top-4 right-4 inline-flex cursor-pointer items-center
-				justify-center disabled:cursor-not-allowed disabled:opacity-50"
-					onclick={() => {
-						if (typeof controls !== 'function' && controls?.close?.action) {
-							controls?.close?.action?.(dialogAPI);
-						} else if (!frozen) {
-							open = false;
-						}
-					}}
-					disabled={frozen}
-				>
-					<X size="1.5em" weight="bold" />
-				</button>
-			{/if}
 		</div>
 	</div>
 {/snippet}
+
+{#snippet dialogCancelButton(state: DialogState, opts?: DialogControls['cancel'])}
+	<Button
+		class={opts?.class}
+		onclick={() => {
+			if (opts?.action) {
+				opts.action(state.api);
+			} else if (!state.frozen) {
+				state.api.close();
+			}
+		}}
+		disabled={state.frozen}
+	>
+		{opts?.label || 'Cancel'}
+	</Button>
+{/snippet}
+
+{#snippet dialogOkButton(state: DialogState, opts?: DialogControls['ok'])}
+	<Button
+		class={opts?.class}
+		onclick={() => {
+			if (opts?.action) {
+				opts.action(state.api);
+			} else if (!state.frozen && !state.loading && !state.disabled) {
+				state.api.close();
+			}
+		}}
+		disabled={state.frozen || state.loading || state.disabled}
+		loading={state.loading}
+	>
+		{opts?.label || 'OK'}
+	</Button>
+{/snippet}
+
+{#snippet dialogCloseButton(state: DialogState, opts?: Omit<DialogControlButton, 'label'> | null)}
+	<button
+		type="button"
+		aria-label="close"
+		class={[
+			'inline-flex cursor-pointer items-center justify-center',
+			'disabled:cursor-not-allowed disabled:opacity-50',
+			'rounded-full p-2 transition-colors hover:bg-zinc-200/50'
+		]}
+		onclick={() => {
+			if (opts?.action) {
+				opts.action(state.api);
+			} else if (!state.frozen) {
+				state.api.close();
+			}
+		}}
+		disabled={state.frozen}
+	>
+		<X size="1.25em" weight="bold" />
+	</button>
+{/snippet}
+
+{#snippet stringOrSnippet(val: string | Snippet)}
+	{#if typeof val === 'string'}
+		{val}
+	{:else}
+		{@render val()}
+	{/if}
+{/snippet}

src/lib/index.ts

@@ -6,7 +6,14 @@ export { default as CenterBox } from './CenterBox.svelte';
 export { default as Checkbox, type CheckboxState } from './Checkbox.svelte';
 export { default as Combobox, type ComboboxOption } from './Combobox.svelte';
 export { default as DateInput } from './DateInput.svelte';
-export { default as Dialog, type DialogAPI, type DialogControls } from './Dialog.svelte';
+export {
+	default as Dialog,
+	type DialogAPI,
+	type DialogControls,
+	dialogCancelButton,
+	dialogCloseButton,
+	dialogOkButton
+} from './Dialog.svelte';
 export {
 	default as DurationInput,
 	formatDuration,