From 3f6bd71aaac4277d046485fe8ea2a791ea089cd8 Mon Sep 17 00:00:00 2001
From: Wolfgang Müller
Date: Tue, 18 Feb 2025 15:51:14 +0100
Subject: frontend: Migrate PageView to Svelte 5

---
 frontend/src/lib/reader/PageView.svelte            | 19 +++---
 frontend/src/lib/reader/Reader.svelte              | 73 +---------------------
 .../lib/reader/components/CloseReaderButton.svelte |  2 +-
 .../src/lib/reader/components/PageIndicator.svelte |  2 +-
 .../lib/reader/components/ReaderMenuButton.svelte  |  2 +-
 5 files changed, 14 insertions(+), 84 deletions(-)

(limited to 'frontend/src/lib/reader')

diff --git a/frontend/src/lib/reader/PageView.svelte b/frontend/src/lib/reader/PageView.svelte
index fc45cfa..2f8def7 100644
--- a/frontend/src/lib/reader/PageView.svelte
+++ b/frontend/src/lib/reader/PageView.svelte
@@ -1,20 +1,14 @@
 <script lang="ts">
 	import { Direction, Layout, type PageFragment } from '$gql/graphql';
+	import { getReaderContext, partition } from '$lib/Reader.svelte';
 	import { binds } from '$lib/Shortcuts';
 	import { src } from '$lib/Utils';
-	import { getReaderContext, partition, type Chunk } from './Reader.svelte';
+	import PageIndicator from './components/PageIndicator.svelte';
 	import ReaderPage from './ReaderPage.svelte';
 
 	const reader = getReaderContext();
 
-	export let direction: Direction;
-	export let layout: Layout;
-
-	let chunks: Chunk[] = [];
-	let lookup: number[] = [];
-
-	let main: PageFragment;
-	let secondary: PageFragment | undefined;
+	let { direction, layout }: { direction: Direction; layout: Layout } = $props();
 
 	function gotoChunk(to: number) {
 		if (to < 0 || to >= chunks.length) return;
@@ -61,8 +55,8 @@
 		}
 	}
 
-	$: [chunks, lookup] = partition(reader.pages, layout);
-	$: layout, ({ main, secondary } = chunks[lookup[reader.page]]);
+	let [chunks, lookup] = $derived(partition(reader.pages, layout));
+	let { main, secondary } = $derived(chunks[lookup[reader.page]]);
 </script>
 
 <svelte:document
@@ -89,6 +83,9 @@
 	<ReaderPage page={secondary} onclick={next} --justify="flex-end" />
 	<ReaderPage page={main} onclick={prev} --justify="flex-start" />
 {/if}
+<div class="absolute right-0 bottom-0 z-10 flex p-1 text-lg">
+	<PageIndicator />
+</div>
 <div class="invisible absolute">
 	{#each pagesAround(reader.page) as page}
 		<img src={src(page.image, 'full')} alt="" />
diff --git a/frontend/src/lib/reader/Reader.svelte b/frontend/src/lib/reader/Reader.svelte
index b5cc725..2e7e851 100644
--- a/frontend/src/lib/reader/Reader.svelte
+++ b/frontend/src/lib/reader/Reader.svelte
@@ -1,72 +1,10 @@
-<script lang="ts" module>
-	import { Layout, type PageFragment } from '$gql/graphql';
-	import { getContext, setContext } from 'svelte';
-
-	export interface Chunk {
-		main: PageFragment;
-		secondary?: PageFragment;
-		index: number;
-	}
-
-	class ReaderContext {
-		visible = $state(false);
-		sidebar = $state(false);
-		pages: PageFragment[] = $state([]);
-		page = $state(0);
-
-		open = (page: number) => {
-			this.page = page;
-			this.visible = true;
-		};
-	}
-
-	export function initReaderContext() {
-		return setContext<ReaderContext>('reader', new ReaderContext());
-	}
-
-	export function getReaderContext() {
-		return getContext<ReaderContext>('reader');
-	}
-
-	export function partition(pages: PageFragment[], layout: Layout): [Chunk[], number[]] {
-		const single = layout === Layout.Single;
-		const offset = layout === Layout.DoubleOffset;
-
-		const chunks: Chunk[] = [];
-		const lookup: number[] = Array<number>(pages.length);
-
-		for (let chunkIndex = 0, pageIndex = 0; pageIndex < pages.length; chunkIndex++) {
-			const wide = () => pages[pageIndex].image.aspectRatio > 1;
-
-			const nextPage = () => {
-				lookup[pageIndex] = chunkIndex;
-				return pages[pageIndex++];
-			};
-
-			const offsetFirst = pageIndex === 0 && offset;
-			const full = single || wide() || offsetFirst;
-
-			const chunk: Chunk = { index: pageIndex, main: nextPage() };
-
-			if (!full && pageIndex < pages.length) {
-				if (!wide()) {
-					chunk.secondary = nextPage();
-				}
-			}
-
-			chunks.push(chunk);
-		}
-		return [chunks, lookup];
-	}
-</script>
-
 <script lang="ts">
 	import { trapFocus } from '$lib/Actions';
+	import { getReaderContext } from '$lib/Reader.svelte';
 	import { fadeDefault, slideXDefault } from '$lib/Transitions';
 	import type { Snippet } from 'svelte';
 	import { fade, slide } from 'svelte/transition';
 	import CloseReaderButton from './components/CloseReaderButton.svelte';
-	import PageIndicator from './components/PageIndicator.svelte';
 	import ReaderMenuButton from './components/ReaderMenuButton.svelte';
 
 	let { sidebar, children }: { sidebar?: Snippet; children?: Snippet } = $props();
@@ -77,7 +15,7 @@
 {#if reader.visible}
 	<div
 		role="dialog"
-		class="fixed bottom-0 left-0 right-0 top-0 z-10 flex h-full w-full bg-black"
+		class="fixed top-0 right-0 bottom-0 left-0 z-10 flex h-full w-full bg-black"
 		transition:fade={fadeDefault}
 		use:trapFocus
 	>
@@ -95,13 +33,8 @@
 				{/if}
 				<CloseReaderButton />
 			</div>
-			<div class="absolute bottom-0 right-0 z-10 flex p-1 text-lg">
-				<PageIndicator />
-			</div>
 
-			<div class="flex grow">
-				{@render children?.()}
-			</div>
+			{@render children?.()}
 		</main>
 	</div>
 {/if}
diff --git a/frontend/src/lib/reader/components/CloseReaderButton.svelte b/frontend/src/lib/reader/components/CloseReaderButton.svelte
index f3eb4ba..8dc5f4f 100644
--- a/frontend/src/lib/reader/components/CloseReaderButton.svelte
+++ b/frontend/src/lib/reader/components/CloseReaderButton.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
+	import { getReaderContext } from '$lib/Reader.svelte';
 	import { accelerator } from '$lib/Shortcuts';
-	import { getReaderContext } from '../Reader.svelte';
 
 	const reader = getReaderContext();
 
diff --git a/frontend/src/lib/reader/components/PageIndicator.svelte b/frontend/src/lib/reader/components/PageIndicator.svelte
index 3b11389..d0a3d0c 100644
--- a/frontend/src/lib/reader/components/PageIndicator.svelte
+++ b/frontend/src/lib/reader/components/PageIndicator.svelte
@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { getReaderContext } from '../Reader.svelte';
+	import { getReaderContext } from '$lib/Reader.svelte';
 
 	const reader = getReaderContext();
 </script>
diff --git a/frontend/src/lib/reader/components/ReaderMenuButton.svelte b/frontend/src/lib/reader/components/ReaderMenuButton.svelte
index 58648e8..ea2705d 100644
--- a/frontend/src/lib/reader/components/ReaderMenuButton.svelte
+++ b/frontend/src/lib/reader/components/ReaderMenuButton.svelte
@@ -1,6 +1,6 @@
 <script lang="ts">
+	import { getReaderContext } from '$lib/Reader.svelte';
 	import { accelerator } from '$lib/Shortcuts';
-	import { getReaderContext } from '../Reader.svelte';
 
 	const reader = getReaderContext();
 
-- 
cgit v1.2.3-2-gb3c3