Add focus previous/next overlay buttons.

packages/gallery/src/interface/focus.js

@@ -7,6 +7,7 @@ import {
 	defineElement as el
 } from '../utils/domvm.js';
 
+import { router } from '../services/router.js';
 import { ImageType } from '../data/image.js';
 import { pouchDocHash, pick } from '../utils/conversion.js';
 import { AttachmentImageView } from './components/attachmentImage.js';
@@ -17,15 +18,16 @@ import { error } from '../services/console.js';
 import { CLICKABLE } from './styles.js';
 
 export function FocusView(vm, params, key, { appbar }) {
-	const id = params.vars.id;
+	const id = prop();
+	const doc = prop(null, pouchDocHash);
 	const { body } = document;
 	const windowSize = prop({}, o => (o ? `${o.width}x${o.height}` : ''));
+	const nextLink = prop();
+	const prevLink = prop();
 
 	const extractWindowSize = () =>
 		windowSize({ width: window.innerWidth, height: window.innerHeight });
 
-	const doc = container({}, pouchDocHash);
-
 	const imageStyle = computed(
 		({ width: iw, height: ih }, { width: vw, height: vh }) => {
 			const imageRatio = iw / ih;
@@ -47,7 +49,7 @@ export function FocusView(vm, params, key, { appbar }) {
 	);
 
 	async function goBack() {
-		history.go(-1);
+		router.goto('home');
 	}
 
 	function navBack() {
@@ -56,7 +58,7 @@ export function FocusView(vm, params, key, { appbar }) {
 	}
 
 	async function clickTrash() {
-		await ImageType.delete(id);
+		await ImageType.delete(id());
 		navBack();
 	}
 
@@ -76,43 +78,98 @@ export function FocusView(vm, params, key, { appbar }) {
 		];
 	}
 
+	// Set the appbar title.
+	appbar.pushState({ title: '', buttons: renderAppBarButtons, style: { position: 'fixed' } });
+
 	// Prime our window size
 	extractWindowSize();
 	window.addEventListener('resize', extractWindowSize);
 
-	// Set the appbar title.
-	appbar.pushState({ title: '', buttons: renderAppBarButtons, style: { position: 'fixed' } });
-
-	// Look for our image and set it.
-	ImageType.find(id)
-		.then(d => {
-			doc.src = d.sizes.full || d.sizes.preview || d.sizes.thumbnail;
-			doc.width = d.width;
-			doc.height = d.height;
-			doc._id = d._id;
-		})
-		.catch(error);
-
 	// Subscribe to our changables.
 	subscribeToRender(
 		vm,
-		[doc, imageStyle],
+		[doc, imageStyle, nextLink, prevLink],
-		[appbar.subscribe(goBack), () => window.removeEventListener('resize', extractWindowSize)]
+		[
+			appbar.subscribe(goBack),
+
+			// Keep up with the window resizing
+			() => window.removeEventListener('resize', extractWindowSize),
+
+			// Look for our image and set it.
+			id.subscribe(async _id => {
+				if (!_id) {
+					return;
+				}
+				const image = await ImageType.find(_id);
+				doc(image);
+
+				Promise.all([
+					ImageType.find({ _id: { $lt: _id } }, { limit: 2, sort: [{ _id: 'desc' }] }),
+					ImageType.find({ _id: { $gt: _id } }, { limit: 2 })
+				]).then(([prev, next]) => {
+					nextLink(next.length ? router.href('focus', { id: next[0]._id }) : null);
+					prevLink(prev.length ? router.href('focus', { id: prev[0]._id }) : null);
+				});
+			})
+		]
 	);
 
+	// Watch for focus changes
+	vm.config({ hooks: { willUpdate: (vm, { vars }) => id(vars.id) } });
+
+	// Start navigation
+	id(params.vars.id);
+
 	return function() {
-		if (!doc._id) {
+		const _id = doc() && doc()._id;
+
+		if (!_id) {
 			return Overlay('Loading...');
 		}
+
 		return focusContainer([
-			AttachmentImageView({
+			prevLink()
-				src: doc._id ? doc.src : null,
+				? prevClickZone({ href: prevLink() }, [
-				style: imageStyle()
+						Icon({
+							name: 'chevron_left',
+							size: 0.75
 						})
+				  ])
+				: null,
+			AttachmentImageView({
+				src: _id ? doc().sizes.full : null,
+				style: imageStyle()
+			}),
+			nextLink()
+				? nextClickZone({ href: nextLink() }, [
+						Icon({
+							name: 'chevron_right',
+							size: 0.75
+						})
+				  ])
+				: null
 		]);
 	};
 }
 
+const WIDE = injectStyle({ width: '100%' });
+const TALL = injectStyle({ height: '100%' });
+const CSS_CLICK_ZONE = {
+	position: 'absolute',
+	width: '33%',
+	height: '70%',
+	display: 'flex',
+	alignItems: 'center',
+	padding: '2em',
+	top: '15%',
+	transition: 'opacity .13s cubic-bezier(0.0,0.0,0.2,1)',
+	opacity: 0,
+	cursor: 'pointer',
+	':hover': {
+		opacity: 1
+	}
+};
+
 const trashButtonContainer = styled(
 	{
 		marginRight: '1em'
@@ -128,5 +185,20 @@ const focusContainer = styled({
 	overflow: 'hidden'
 });
 
-const WIDE = injectStyle({ width: '100%' });
+const nextClickZone = styled(
-const TALL = injectStyle({ height: '100%' });
+	'a',
+	{
+		right: '0px',
+		justifyContent: 'flex-end'
+	},
+	CSS_CLICK_ZONE
+);
+
+const prevClickZone = styled(
+	'a',
+	{
+		left: '0px',
+		justifyContent: 'flex-start'
+	},
+	CSS_CLICK_ZONE
+);

packages/gallery/src/interface/gallery.js

@@ -44,7 +44,7 @@ export function GalleryView(vm) {
 				renderSwitch(
 					{
 						photos: [AllImagesView, {}, 'allImages', context],
-						focus: [FocusView, routeParams(), 'focus', context]
+						focus: [FocusView, routeParams(), `focus_${routeParams() && routeParams().id}`, context]
 					},
 					routeName()
 				)

packages/gallery/src/utils/comparators.js

@@ -13,7 +13,7 @@ export function pouchDocArrayComparator(a, b) {
 }
 
 export function isObject(obj) {
-	return typeof obj === 'object' && !Array.isArray(obj);
+	return typeof obj === 'object' && !Array.isArray(obj) && obj !== null;
 }
 
 export function isString(obj) {