Add swipe controls to move back and forth in albums

res/static/style/layout.css

@@ -23,7 +23,7 @@
 	font-style: normal;
 	font-size: 1.5em;
 	display: inline-block;
-	line-height: 1;
+	line-height: 1em;
 	text-transform: none;
 	letter-spacing: normal;
 	word-wrap: normal;
@@ -496,7 +496,7 @@ select {
 	border-radius: 6px;
 	margin: 2px;
 	background: var(--input_background);
-	padding: 3px 4px;
+	padding: 3px;
 	overflow: hidden;
 	color: var(--input_text);
 	cursor: pointer;
@@ -543,7 +543,7 @@ input[type="color"]:active,
 select:active {
 	box-shadow: inset 4px 4px 6px var(--shadow_color);
 	/* Exactly 3px offset compared to the inactive padding to give a depth effect */
-	padding: 6px 1px 0px 7px;
+	padding: 6px 0px 0px 6px;
 }
 
 .button_highlight {
@@ -654,7 +654,7 @@ input[type="datetime-local"] {
 	border: none;
 	border-radius: 5px;
 	background: var(--input_background);
-	padding: 3px 4px;
+	padding: 3px;
 	box-shadow: inset 1px 1px 0px 0px var(--shadow_color);
 	/* override user-agent style */
 	min-width: 100px;

svelte/src/file_viewer/FileViewer.svelte

@@ -372,8 +372,9 @@ const keyboard_event = evt => {
 		{#if !disable_menu}
 			<button
 				on:click={toolbar_toggle}
-				class="button_toggle_toolbar round"
+				class="round"
 				class:button_highlight={toolbar_visible}
+				style="line-height: 1em;"
 				title="Open or close the toolbar">
 				<i class="icon">menu</i>
 			</button>

svelte/src/file_viewer/ListNavigator.svelte

@@ -94,7 +94,6 @@ export const set_item = idx => {
 .nav_button{
 	flex-grow: 0;
 	flex-shrink: 0;
-	margin: 4px;
 }
 
 .list_navigator {
@@ -107,9 +106,9 @@ export const set_item = idx => {
 
 .file_button {
 	position: relative;
-	height: 48px;
+	height: 2.6em;
 	width: 220px;
-	margin: 4px 3px;
+	margin: 2px;
 	padding: 0;
 	overflow: hidden;
 	border-radius: 6px;
@@ -124,7 +123,7 @@ export const set_item = idx => {
 	text-decoration: none;
 	vertical-align: top;
 	cursor: pointer;
-	border-width: 2px;
+	border-width: 1px;
 	border-style: solid;
 	border-color: var(--input_background);
 	box-shadow: 1px 1px 0px 0px var(--shadow_color);

svelte/src/file_viewer/ReportWindow.svelte

@@ -182,9 +182,12 @@ const report_description = () => {
 
 		{#each abuse_categories as cat}
 			{#if cat.filter === undefined || cat.filter(file.mime_type) }
-				<label class="type_label" for="type_{cat.type}">
-					<input class="type_button" type="radio" bind:group={abuse_type} id="type_{cat.type}" name="abuse_type" value="{cat.type}">
-					<span class="type_desc"><b>{cat.name}</b>: {cat.desc}</span>
+				<label for="type_{cat.type}">
+					<input type="radio" bind:group={abuse_type} id="type_{cat.type}" name="abuse_type" value="{cat.type}">
+					<div>
+						<b>{cat.name}</b><br/>
+						{cat.desc}
+					</div>
 				</label>
 			{/if}
 		{/each}
@@ -193,11 +196,11 @@ const report_description = () => {
 			<h3>Report multiple files?</h3>
 			<label for="report_single">
 				<input type="radio" bind:group={single_or_all} id="report_single" name="single_or_all" value="single">
-				Report only the selected file ({file.name})
+				<div>Report only the selected file ({file.name})</div>
 			</label>
 			<label for="report_all" style="border-bottom: none;">
 				<input type="radio" bind:group={single_or_all} id="report_all" name="single_or_all" value="all">
-				Report all {list.files.length} files in this album
+				<div>Report all {list.files.length} files in this album</div>
 			</label>
 		{/if}
 
@@ -270,9 +273,22 @@ const report_description = () => {
 	overflow: hidden;
 }
 label {
-	display: block;
-	border-bottom: 1px var(--separator) solid;
-	padding: 0.5em;
+	padding: 0.2em;
+	display: flex;
+	flex-direction: row;
+}
+label > input {
+	flex: 0 0 auto;
+	margin-right: 0.5em;
+}
+label > div {
+	flex: 1 1 auto;
+	padding: 0 0.2em;
+	border-radius: 6px;
+	border: 1px solid var(--separator);
+}
+input[type="radio"]:checked+div {
+	border-color: var(--highlight_color);
 }
 .spinner_container {
 	position: absolute;
@@ -294,15 +310,4 @@ label {
 .report_form > textarea {
 	height: 5em;
 }
-.type_label {
-	display: flex;
-	flex-direction: row;
-}
-.type_button {
-	flex: 0 0 auto;
-	margin-right: 1em;
-}
-.type_label {
-	flex: 1 1 auto;
-}
 </style>

svelte/src/file_viewer/viewers/FilePreview.svelte

@@ -59,7 +59,7 @@ export const set_file = async file => {
 {:else if viewer_type === "rate_limit"}
 	<RateLimit bind:this={viewer} on:download></RateLimit>
 {:else if viewer_type === "image"}
-	<Image bind:this={viewer} on:loading></Image>
+	<Image bind:this={viewer} is_list={is_list} on:prev on:next on:loading></Image>
 {:else if viewer_type === "video"}
 	<Video bind:this={viewer} is_list={is_list} on:loading on:download on:prev on:next on:reload></Video>
 {:else if viewer_type === "audio"}

svelte/src/file_viewer/viewers/Image.svelte

@@ -1,20 +1,36 @@
 <script>
 import { createEventDispatcher } from "svelte"
+import { swipe_nav } from "./SwipeNavigate.svelte";
 let dispatch = createEventDispatcher()
 
-export const set_file = f => file = f
+export const set_file = f => {
+	file = f
+	dispatch("loading", true)
+}
 let file = {
 	id: "",
 	name: "",
 	mime_type: "",
 	get_href: "",
 }
+export let is_list = false
 
 let container
 let zoom = false
 let x, y = 0
 let dragging = false
 
+// For some reason the dblclick event is firing twice during testing.. So here's
+// an event debouncer
+let last_dblclick = 0
+const double_click = e => {
+	let now = Date.now()
+	if (now - last_dblclick > 500) {
+		zoom = !zoom
+	}
+	last_dblclick = now
+}
+
 const mousedown = (e) => {
 	if (!dragging && e.which === 1 && zoom) {
 		x = e.pageX
@@ -48,20 +64,35 @@ const mouseup = (e) => {
 		return false
 	}
 }
+
+let container_style = ""
+const on_load = () => {
+	dispatch("loading", false)
+	container_style = ""
+}
 </script>
 
 <svelte:window on:mousemove={mousemove} on:mouseup={mouseup} />
 
-<div bind:this={container} class="container" class:zoom>
+<div
+	bind:this={container}
+	class="container"
+	class:zoom
+	use:swipe_nav={!zoom && is_list}
+	on:style={e => container_style = e.detail}
+	on:prev
+	on:next
+	style={container_style}
+>
 	<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
 	<img
-		on:loadstart={() => {dispatch("loading", true)}}
-		on:load={() => {dispatch("loading", false)}}
-		on:error={() => {dispatch("loading", false)}}
-		on:dblclick={() => {zoom = !zoom}}
-		on:doubletap={() => {zoom = !zoom}}
+		on:load={on_load}
+		on:error={on_load}
+		on:dblclick={double_click}
+		on:doubletap={double_click}
 		on:mousedown={mousedown}
-		class="image" class:zoom
+		class="image"
+		class:zoom
 		src={file.get_href}
 		alt={file.name} />
 </div>

svelte/src/file_viewer/viewers/SwipeNavigate.svelte

@@ -0,0 +1,76 @@
+<script context="module">
+export const swipe_nav = (node, swipe_enabled) => {
+	let start_x = 0
+	let start_y = 0
+	let render_offset = 0
+	let enabled = swipe_enabled
+
+	const touchstart = e => {
+		start_x = e.touches[0].clientX
+		start_y = e.touches[0].clientY
+		render_offset = 0
+	}
+
+	const touchmove = e => {
+		if (!enabled) {
+			return
+		}
+
+		let offset_x = e.touches[0].clientX - start_x
+		let abs_x = Math.abs(offset_x)
+		let abs_y = Math.abs(e.touches[0].clientY - start_y)
+		let neg = offset_x < 0 ? -1 : 1
+
+		if (abs_x > 100 && abs_y < abs_x/3) {
+			set_offset((abs_x-100)*neg, false)
+		} else {
+			set_offset(0, true)
+		}
+	}
+
+	const touchend = e => {
+		if (!enabled) {
+			return
+		}
+
+		if (render_offset > 100) {
+			set_offset(1000, true)
+			node.dispatchEvent(new CustomEvent("prev"))
+		} else if (render_offset < -100) {
+			set_offset(-1000, true)
+			node.dispatchEvent(new CustomEvent("next"))
+		} else {
+			set_offset(0, true)
+		}
+	}
+
+	const set_offset = (off, animate) => {
+		render_offset = off
+
+		let detail = "transform: translateX("+off+"px);"
+		if (animate) {
+			detail += "transition: transform 500ms;"
+		}
+
+		node.dispatchEvent(new CustomEvent("style", {detail: detail}))
+	}
+
+	node.addEventListener("touchstart", touchstart)
+	node.addEventListener("touchmove", touchmove)
+	node.addEventListener("touchend", touchend)
+
+	return {
+		update(swipe_enabled) {
+			enabled = swipe_enabled
+			if (!enabled) {
+				render_offset = 0
+			}
+		},
+		destroy() {
+			node.removeEventListener("touchstart", touchstart)
+			node.removeEventListener("touchmove", touchmove)
+			node.removeEventListener("touchend", touchend)
+		}
+	}
+}
+</script>

svelte/src/filesystem/viewers/FilePreview.svelte

@@ -56,11 +56,11 @@ const state_update = async (base) => {
 		<CustomBanner path={state.path}/>
 	</FileManager>
 {:else if viewer_type === "audio"}
-	<Audio bind:this={viewer} fs_navigator={fs_navigator} state={state}>
+	<Audio state={state} bind:this={viewer} fs_navigator={fs_navigator}>
 		<CustomBanner path={state.path}/>
 	</Audio>
 {:else if viewer_type === "image"}
-	<Image state={state} on:open_sibling/>
+	<Image state={state} bind:this={viewer} on:open_sibling/>
 {:else if viewer_type === "video"}
 	<Video state={state} bind:this={viewer} on:open_sibling/>
 {:else if viewer_type === "pdf"}

svelte/src/filesystem/viewers/Image.svelte

@@ -1,12 +1,20 @@
 <script>
+import { createEventDispatcher } from "svelte";
+import { swipe_nav } from "../../file_viewer/viewers/SwipeNavigate.svelte";
 import { fs_path_url } from "../FilesystemUtil";
 
+let dispatch = createEventDispatcher()
 
 export let state
 let container
 let zoom = false
 let x, y = 0
 let dragging = false
+let container_style = ""
+
+export const update = () => {
+	container_style = ""
+}
 
 const mousedown = (e) => {
 	if (!dragging && e.which === 1 && zoom) {
@@ -45,7 +53,16 @@ const mouseup = (e) => {
 
 <svelte:window on:mousemove={mousemove} on:mouseup={mouseup} />
 
-<div bind:this={container} class="container" class:zoom>
+<div
+	bind:this={container}
+	class="container"
+	class:zoom
+	use:swipe_nav={!zoom}
+	on:style={e => container_style = e.detail}
+	on:prev={() => dispatch("open_sibling", -1)}
+	on:next={() => dispatch("open_sibling", 1)}
+	style={container_style}
+>
 	<!-- svelte-ignore a11y-no-noninteractive-element-interactions -->
 	<img
 		on:dblclick={() => {zoom = !zoom}}