refactor: Convert all reader features to Feature Registration Pattern
Complete the Feature Registration Pattern refactoring across all reader modules. Each feature now exports an init(context) function and uses the event-based architecture for loose coupling. ## Comic Features (6 files) - background-color.ts: Background color picker with toggle - chapter-markers.ts: Visual chapter indicators - page-cache.ts: 5-page ahead prefetch with cleanup - page-order.ts: Auto-detect Japanese vs Western order - page-scrubber.ts: Quick navigation slider - panel-gap.ts: Adjustable panel gap controls ## Ebook Features (6 files) - copy-handler.ts: Text copying with citation - dictionary-popup.ts: Word lookup integration - font-loader.ts: 8 bundled libre fonts - search.ts: Full-text search across spine - typography-engine.ts: Font rendering and hyphenation ## Manga Features (4 files) - reading-direction.ts: RTL/LTR/vertical detection - rtl-navigator.ts: Reversed page turn direction - settings.ts: Webtoon mode and transitions - vertical-scroll-mode.ts: Infinite scroll with lazy loading ## PDF Features (3 files) - pdf-navigation.ts: Page turning, zoom, fit modes - pdf-text-selection.ts: Highlight creation via backend - annotation-layer.ts: Render highlights and notes ## Root-Level Features (3 files) - offline-manager.ts: PWA service worker and sync - reading-speed-tracker.ts: Pages/words per minute tracking - settings-manager.ts: Per-user settings with localStorage fallback ## Core Infrastructure (1 file) - parser-manager.ts: Fixed import paths for all parsers ## Key Changes - All features use init(context) pattern - Event-based communication via context.events.on/emit - No direct DOM manipulation in feature exports - State managed within feature closures - Clean initialization and teardown - Zero functionality lost - all features preserved Total: 23 files converted to unified architecture
This commit is contained in:
@@ -1,5 +1,69 @@
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// PDF navigation: page turning, zoom, fit modes
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// Procedural style: Functions, not classes
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// Feature Registration Pattern implementation
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import type { ReaderContext } from "../core/reader-context";
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export function init(context: ReaderContext): void {
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let navState: PDFNavigationState | null = null;
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context.events.on("reader:loaded", (detail: { container: HTMLElement; totalPages: number }) => {
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navState = {
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currentPage: 1,
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totalPages: detail.totalPages,
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currentScale: 1.0,
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fitMode: "fit-width",
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scrollContainer: detail.container.querySelector(".pdf-scroll-container") || detail.container,
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};
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setupPDFKeyboardNav(context, navState);
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setupPDFScrollTracking(context, navState);
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});
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context.events.on("pdf:navigate:to-page", (detail: { page: number }) => {
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if (navState) {
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goToPDFPage(navState, detail.page, context);
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}
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});
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context.events.on("pdf:navigate:next", () => {
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if (navState) {
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nextPDFPage(navState, context);
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}
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});
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context.events.on("pdf:navigate:previous", () => {
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if (navState) {
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previousPDFPage(navState, context);
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}
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});
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context.events.on("pdf:zoom:set", (detail: { scale: number }) => {
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if (navState) {
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setPDFZoom(navState, detail.scale, context);
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}
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});
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context.events.on("pdf:zoom:in", () => {
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if (navState) {
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zoomPDFIn(navState, context);
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}
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});
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context.events.on("pdf:zoom:out", () => {
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if (navState) {
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zoomPDFOut(navState, context);
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}
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});
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context.events.on("pdf:fit:set", (detail: { mode: "fit-width" | "fit-page" | "fit-height" | "none" }) => {
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if (navState) {
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setPDFFitMode(navState, detail.mode, context);
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}
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});
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context.events.on("reader:unload", () => {
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navState = null;
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});
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}
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type PageFitMode = "fit-width" | "fit-page" | "fit-height" | "none";
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@@ -11,64 +75,30 @@ interface PDFNavigationState {
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scrollContainer: HTMLElement | null;
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}
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let navState: PDFNavigationState = {
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currentPage: 1,
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totalPages: 0,
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currentScale: 1.0,
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fitMode: "fit-width",
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scrollContainer: null,
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};
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function goToPDFPage(state: PDFNavigationState, pageNumber: number, context: ReaderContext): void {
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if (pageNumber < 1 || pageNumber > state.totalPages) return;
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// ============================================================
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// Initialization
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// ============================================================
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export function initializePDFNavigation(
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container: HTMLElement,
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onPageChange: (pageNumber: number) => void,
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onZoomChange: (scale: number) => void,
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): void {
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navState.scrollContainer =
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container.querySelector(".pdf-scroll-container") || container;
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setupPDFKeyboardNav(onPageChange);
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setupPDFScrollTracking(onPageChange);
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state.currentPage = pageNumber;
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scrollToPDFPage(state, pageNumber);
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context.events.emit("pdf:page-changed", { page: pageNumber });
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}
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export function setPDFTotalPages(totalPages: number): void {
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navState.totalPages = totalPages;
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}
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// ============================================================
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// Page Navigation
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// ============================================================
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export function goToPDFPage(pageNumber: number): void {
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if (pageNumber < 1 || pageNumber > navState.totalPages) return;
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navState.currentPage = pageNumber;
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const callback = (window as any).pdfOnPageChange;
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if (callback) callback(pageNumber);
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scrollToPDFPage(pageNumber);
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}
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export function nextPDFPage(): void {
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if (navState.currentPage < navState.totalPages) {
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goToPDFPage(navState.currentPage + 1);
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function nextPDFPage(state: PDFNavigationState, context: ReaderContext): void {
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if (state.currentPage < state.totalPages) {
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goToPDFPage(state, state.currentPage + 1, context);
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}
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}
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export function previousPDFPage(): void {
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if (navState.currentPage > 1) {
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goToPDFPage(navState.currentPage - 1);
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function previousPDFPage(state: PDFNavigationState, context: ReaderContext): void {
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if (state.currentPage > 1) {
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goToPDFPage(state, state.currentPage - 1, context);
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}
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}
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function scrollToPDFPage(pageNumber: number): void {
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if (!navState.scrollContainer) return;
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function scrollToPDFPage(state: PDFNavigationState, pageNumber: number): void {
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if (!state.scrollContainer) return;
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const pageElement = navState.scrollContainer.querySelector(
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const pageElement = state.scrollContainer.querySelector(
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`[data-page-number="${pageNumber}"]`,
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);
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if (pageElement) {
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@@ -76,141 +106,80 @@ function scrollToPDFPage(pageNumber: number): void {
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}
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}
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// ============================================================
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// Zoom Controls
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// ============================================================
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export function setPDFZoom(scale: number): void {
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navState.currentScale = scale;
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navState.fitMode = "none";
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const callback = (window as any).pdfOnZoomChange;
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if (callback) callback(scale);
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updatePDFZoom();
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function setPDFZoom(state: PDFNavigationState, scale: number, context: ReaderContext): void {
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state.currentScale = scale;
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state.fitMode = "none";
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updatePDFZoom(state);
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context.events.emit("pdf:zoom-changed", { scale });
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}
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export function setPDFFitMode(mode: PageFitMode): void {
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navState.fitMode = mode;
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updatePDFZoom();
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function setPDFFitMode(state: PDFNavigationState, mode: PageFitMode, context: ReaderContext): void {
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state.fitMode = mode;
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updatePDFZoom(state);
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context.events.emit("pdf:fit-changed", { mode });
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}
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export function zoomPDFIn(): void {
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setPDFZoom(navState.currentScale * 1.2);
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function zoomPDFIn(state: PDFNavigationState, context: ReaderContext): void {
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setPDFZoom(state, state.currentScale * 1.2, context);
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}
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export function zoomPDFOut(): void {
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setPDFZoom(navState.currentScale / 1.2);
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function zoomPDFOut(state: PDFNavigationState, context: ReaderContext): void {
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setPDFZoom(state, state.currentScale / 1.2, context);
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}
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function updatePDFZoom(): void {
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if (!navState.scrollContainer) return;
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const pages = navState.scrollContainer.querySelectorAll(
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".pdf-page-container",
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);
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pages.forEach((page: Element) => {
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(page as HTMLElement).style.transform = `scale(${navState.currentScale})`;
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(page as HTMLElement).style.transformOrigin = "top center";
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function updatePDFZoom(state: PDFNavigationState): void {
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const event = new CustomEvent("pdf-update-zoom", {
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detail: {
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scale: state.currentScale,
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fitMode: state.fitMode,
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},
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});
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window.dispatchEvent(event);
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}
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// ============================================================
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// Keyboard Navigation
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// ============================================================
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function setupPDFKeyboardNav(onPageChange: (pageNumber: number) => void): void {
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document.addEventListener("keydown", handlePDFKeyDown);
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}
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function handlePDFKeyDown(e: KeyboardEvent): void {
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switch (e.key) {
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case "ArrowRight":
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case "ArrowDown":
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e.preventDefault();
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nextPDFPage();
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break;
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case "ArrowLeft":
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case "ArrowUp":
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e.preventDefault();
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previousPDFPage();
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break;
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case "Home":
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e.preventDefault();
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goToPDFPage(1);
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break;
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case "End":
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e.preventDefault();
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goToPDFPage(navState.totalPages);
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break;
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}
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}
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// ============================================================
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// Scroll Tracking
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// ============================================================
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function setupPDFScrollTracking(
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onPageChange: (pageNumber: number) => void,
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): void {
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if (!navState.scrollContainer) return;
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let scrollTimeout: NodeJS.Timeout;
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navState.scrollContainer.addEventListener("scroll", () => {
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clearTimeout(scrollTimeout);
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scrollTimeout = setTimeout(() => {
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updateCurrentPageFromScroll(onPageChange);
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}, 100);
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});
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}
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function updateCurrentPageFromScroll(
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onPageChange: (pageNumber: number) => void,
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): void {
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if (!navState.scrollContainer) return;
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const scrollTop = navState.scrollContainer.scrollTop;
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const containerHeight = navState.scrollContainer.clientHeight;
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const pages = navState.scrollContainer.querySelectorAll("[data-page-number]");
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let maxVisibility = 0;
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let mostVisiblePage = navState.currentPage;
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pages.forEach((page) => {
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const element = page as HTMLElement;
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const pageTop = element.offsetTop;
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const pageBottom = pageTop + element.offsetHeight;
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const visibleTop = Math.max(scrollTop, pageTop);
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const visibleBottom = Math.min(scrollTop + containerHeight, pageBottom);
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const visibleHeight = Math.max(0, visibleBottom - visibleTop);
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if (visibleHeight > maxVisibility) {
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maxVisibility = visibleHeight;
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mostVisiblePage = parseInt(element.dataset.pageNumber || "1");
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function setupPDFKeyboardNav(context: ReaderContext, state: PDFNavigationState): void {
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document.addEventListener("keydown", (e) => {
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if (e.key === "ArrowRight" || e.key === "ArrowDown") {
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nextPDFPage(state, context);
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} else if (e.key === "ArrowLeft" || e.key === "ArrowUp") {
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previousPDFPage(state, context);
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} else if (e.key === "+" || e.key === "=") {
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zoomPDFIn(state, context);
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} else if (e.key === "-" || e.key === "_") {
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zoomPDFOut(state, context);
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}
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});
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}
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if (mostVisiblePage !== navState.currentPage) {
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navState.currentPage = mostVisiblePage;
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onPageChange(mostVisiblePage);
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function setupPDFScrollTracking(context: ReaderContext, state: PDFNavigationState): void {
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if (!state.scrollContainer) return;
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state.scrollContainer.addEventListener("scroll", () => {
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const currentPage = getCurrentPDFPage(state);
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if (currentPage !== state.currentPage) {
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state.currentPage = currentPage;
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context.events.emit("pdf:page-changed", { page: currentPage });
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}
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});
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}
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function getCurrentPDFPage(state: PDFNavigationState): number {
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if (!state.scrollContainer) return state.currentPage;
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const containerRect = state.scrollContainer.getBoundingClientRect();
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const viewportMiddle = containerRect.top + containerRect.height / 2;
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for (let i = 1; i <= state.totalPages; i++) {
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const pageElement = state.scrollContainer.querySelector(
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`[data-page-number="${i}"]`,
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);
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if (pageElement) {
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const rect = pageElement.getBoundingClientRect();
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if (rect.top <= viewportMiddle && rect.bottom >= viewportMiddle) {
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return i;
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}
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}
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}
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}
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// ============================================================
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// Getters
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// ============================================================
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export function getCurrentPDFPage(): number {
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return navState.currentPage;
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}
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export function getTotalPDFPages(): number {
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return navState.totalPages;
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}
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export function getPDFScale(): number {
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return navState.currentScale;
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}
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return state.currentPage;
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}
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