Kavita/UI/Web/src/app/manga-reader/manga-reader.component.ts
Robbie Davis 9dd71fe102
Fullscreen keybind (#961)
# Added
- Added: Added 'f' as keybind to toggle fullscreen on manga and book readers.
2022-01-19 05:38:49 -08:00

1188 lines
40 KiB
TypeScript

import { AfterViewInit, Component, ElementRef, EventEmitter, HostListener, Inject, OnDestroy, OnInit, Renderer2, SimpleChanges, ViewChild } from '@angular/core';
import { DOCUMENT, Location } from '@angular/common';
import { ActivatedRoute, Router } from '@angular/router';
import { take, takeUntil } from 'rxjs/operators';
import { User } from '../_models/user';
import { AccountService } from '../_services/account.service';
import { ReaderService } from '../_services/reader.service';
import { FormBuilder, FormGroup } from '@angular/forms';
import { NavService } from '../_services/nav.service';
import { ReadingDirection } from '../_models/preferences/reading-direction';
import { ScalingOption } from '../_models/preferences/scaling-option';
import { PageSplitOption } from '../_models/preferences/page-split-option';
import { forkJoin, ReplaySubject, Subject } from 'rxjs';
import { ToastrService } from 'ngx-toastr';
import { KEY_CODES, UtilityService, Breakpoint } from '../shared/_services/utility.service';
import { CircularArray } from '../shared/data-structures/circular-array';
import { MemberService } from '../_services/member.service';
import { Stack } from '../shared/data-structures/stack';
import { ChangeContext, LabelType, Options } from '@angular-slider/ngx-slider';
import { trigger, state, style, transition, animate } from '@angular/animations';
import { ChapterInfo } from './_models/chapter-info';
import { FITTING_OPTION, PAGING_DIRECTION, SPLIT_PAGE_PART } from './_models/reader-enums';
import { pageSplitOptions, scalingOptions } from '../_models/preferences/preferences';
import { READER_MODE } from '../_models/preferences/reader-mode';
import { MangaFormat } from '../_models/manga-format';
import { LibraryService } from '../_services/library.service';
import { LibraryType } from '../_models/library';
const PREFETCH_PAGES = 5;
const CHAPTER_ID_NOT_FETCHED = -2;
const CHAPTER_ID_DOESNT_EXIST = -1;
const ANIMATION_SPEED = 200;
const OVERLAY_AUTO_CLOSE_TIME = 3000;
const CLICK_OVERLAY_TIMEOUT = 3000;
@Component({
selector: 'app-manga-reader',
templateUrl: './manga-reader.component.html',
styleUrls: ['./manga-reader.component.scss'],
animations: [
trigger('slideFromTop', [
state('in', style({ transform: 'translateY(0)'})),
transition('void => *', [
style({ transform: 'translateY(-100%)' }),
animate(ANIMATION_SPEED)
]),
transition('* => void', [
animate(ANIMATION_SPEED, style({ transform: 'translateY(-100%)' })),
])
]),
trigger('slideFromBottom', [
state('in', style({ transform: 'translateY(0)'})),
transition('void => *', [
style({ transform: 'translateY(100%)' }),
animate(ANIMATION_SPEED)
]),
transition('* => void', [
animate(ANIMATION_SPEED, style({ transform: 'translateY(100%)' })),
])
])
]
})
export class MangaReaderComponent implements OnInit, AfterViewInit, OnDestroy {
libraryId!: number;
seriesId!: number;
volumeId!: number;
chapterId!: number;
/**
* Reading List id. Defaults to -1.
*/
readingListId: number = CHAPTER_ID_DOESNT_EXIST;
/**
* If this is true, no progress will be saved.
*/
incognitoMode: boolean = false;
/**
* If this is true, chapters will be fetched in the order of a reading list, rather than natural series order.
*/
readingListMode: boolean = false;
/**
* The current page. UI will show this number + 1.
*/
pageNum = 0;
/**
* Total pages in the given Chapter
*/
maxPages = 1;
user!: User;
generalSettingsForm!: FormGroup;
scalingOptions = scalingOptions;
readingDirection = ReadingDirection.LeftToRight;
scalingOption = ScalingOption.FitToHeight;
pageSplitOption = PageSplitOption.FitSplit;
currentImageSplitPart: SPLIT_PAGE_PART = SPLIT_PAGE_PART.NO_SPLIT;
pagingDirection: PAGING_DIRECTION = PAGING_DIRECTION.FORWARD;
isFullscreen: boolean = false;
autoCloseMenu: boolean = true;
readerMode: READER_MODE = READER_MODE.MANGA_LR;
pageSplitOptions = pageSplitOptions;
isLoading = true;
@ViewChild('reader') reader!: ElementRef;
@ViewChild('content') canvas: ElementRef | undefined;
private ctx!: CanvasRenderingContext2D;
private canvasImage = new Image();
/**
* A circular array of size PREFETCH_PAGES + 2. Maintains prefetched Images around the current page to load from to avoid loading animation.
* @see CircularArray
*/
cachedImages!: CircularArray<HTMLImageElement>;
/**
* A stack of the chapter ids we come across during continuous reading mode. When we traverse a boundary, we use this to avoid extra API calls.
* @see Stack
*/
continuousChaptersStack: Stack<number> = new Stack();
/**
* An event emiter when a page change occurs. Used soley by the webtoon reader.
*/
goToPageEvent: ReplaySubject<number> = new ReplaySubject<number>();
/**
* An event emiter when a bookmark on a page change occurs. Used soley by the webtoon reader.
*/
showBookmarkEffectEvent: ReplaySubject<number> = new ReplaySubject<number>();
/**
* An event emiter when fullscreen mode is toggled. Used soley by the webtoon reader.
*/
fullscreenEvent: ReplaySubject<boolean> = new ReplaySubject<boolean>();
/**
* If the menu is open/visible.
*/
menuOpen = false;
/**
* If the prev page allows a page change to occur.
*/
prevPageDisabled = false;
/**
* If the next page allows a page change to occur.
*/
nextPageDisabled = false;
pageOptions: Options = {
floor: 0,
ceil: 0,
step: 1,
boundPointerLabels: true,
showSelectionBar: true,
translate: (value: number, label: LabelType) => {
if (label == LabelType.Floor) {
return 1 + '';
} else if (label === LabelType.Ceil) {
return this.maxPages + '';
}
return (this.pageNum + 1) + '';
},
animate: false
};
refreshSlider: EventEmitter<void> = new EventEmitter<void>();
/**
* Used to store the Series name for UI
*/
title: string = '';
/**
* Used to store the Volume/Chapter information
*/
subtitle: string = '';
/**
* Timeout id for auto-closing menu overlay
*/
menuTimeout: any;
/**
* If the click overlay is rendered on screen
*/
showClickOverlay: boolean = false;
/**
* Next Chapter Id. This is not garunteed to be a valid ChapterId. Prefetched on page load (non-blocking).
*/
nextChapterId: number = CHAPTER_ID_NOT_FETCHED;
/**
* Previous Chapter Id. This is not garunteed to be a valid ChapterId. Prefetched on page load (non-blocking).
*/
prevChapterId: number = CHAPTER_ID_NOT_FETCHED;
/**
* Is there a next chapter. If not, this will disable UI controls.
*/
nextChapterDisabled: boolean = false;
/**
* Is there a previous chapter. If not, this will disable UI controls.
*/
prevChapterDisabled: boolean = false;
/**
* Has the next chapter been prefetched. Prefetched means the backend will cache the files.
*/
nextChapterPrefetched: boolean = false;
/**
* Has the previous chapter been prefetched. Prefetched means the backend will cache the files.
*/
prevChapterPrefetched: boolean = false;
/**
* If extended settings area is visible. Blocks auto-closing of menu.
*/
settingsOpen: boolean = false;
/**
* A map of bookmarked pages to anything. Used for O(1) lookup time if a page is bookmarked or not.
*/
bookmarks: {[key: string]: number} = {};
/**
* Tracks if the first page is rendered or not. This is used to keep track of Automatic Scaling and adjusting decision after first page dimensions load up.
*/
firstPageRendered: boolean = false;
/**
* Library Type used for rendering chapter or issue
*/
libraryType: LibraryType = LibraryType.Manga;
private readonly onDestroy = new Subject<void>();
getPageUrl = (pageNum: number) => this.readerService.getPageUrl(this.chapterId, pageNum);
get pageBookmarked() {
return this.bookmarks.hasOwnProperty(this.pageNum);
}
get splitIconClass() {
if (this.isSplitLeftToRight()) {
return 'left-side';
} else if (this.isNoSplit()) {
return 'none';
}
return 'right-side';
}
get readerModeIcon() {
switch(this.readerMode) {
case READER_MODE.MANGA_LR:
return 'fa-exchange-alt';
case READER_MODE.MANGA_UD:
return 'fa-exchange-alt fa-rotate-90';
case READER_MODE.WEBTOON:
return 'fa-arrows-alt-v';
}
}
get READER_MODE(): typeof READER_MODE {
return READER_MODE;
}
get ReadingDirection(): typeof ReadingDirection {
return ReadingDirection;
}
get PageSplitOption(): typeof PageSplitOption {
return PageSplitOption;
}
constructor(private route: ActivatedRoute, private router: Router, private accountService: AccountService,
public readerService: ReaderService, private location: Location,
private formBuilder: FormBuilder, private navService: NavService,
private toastr: ToastrService, private memberService: MemberService,
private libraryService: LibraryService, private utilityService: UtilityService,
private renderer: Renderer2, @Inject(DOCUMENT) private document: Document) {
this.navService.hideNavBar();
}
ngOnInit(): void {
const libraryId = this.route.snapshot.paramMap.get('libraryId');
const seriesId = this.route.snapshot.paramMap.get('seriesId');
const chapterId = this.route.snapshot.paramMap.get('chapterId');
if (libraryId === null || seriesId === null || chapterId === null) {
this.router.navigateByUrl('/libraries');
return;
}
this.libraryId = parseInt(libraryId, 10);
this.seriesId = parseInt(seriesId, 10);
this.chapterId = parseInt(chapterId, 10);
this.incognitoMode = this.route.snapshot.queryParamMap.get('incognitoMode') === 'true';
const readingListId = this.route.snapshot.queryParamMap.get('readingListId');
if (readingListId != null) {
this.readingListMode = true;
this.readingListId = parseInt(readingListId, 10);
}
this.continuousChaptersStack.push(this.chapterId);
this.readerService.setOverrideStyles();
this.accountService.currentUser$.pipe(take(1)).subscribe(user => {
if (user) {
this.user = user;
this.readingDirection = this.user.preferences.readingDirection;
this.scalingOption = this.user.preferences.scalingOption;
this.pageSplitOption = this.user.preferences.pageSplitOption;
this.autoCloseMenu = this.user.preferences.autoCloseMenu;
this.readerMode = this.user.preferences.readerMode;
this.generalSettingsForm = this.formBuilder.group({
autoCloseMenu: this.autoCloseMenu,
pageSplitOption: this.pageSplitOption,
fittingOption: this.translateScalingOption(this.scalingOption)
});
this.updateForm();
this.generalSettingsForm.valueChanges.pipe(takeUntil(this.onDestroy)).subscribe((changes: SimpleChanges) => {
this.autoCloseMenu = this.generalSettingsForm.get('autoCloseMenu')?.value;
const needsSplitting = this.isCoverImage();
// If we need to split on a menu change, then we need to re-render.
if (needsSplitting) {
this.loadPage();
}
});
this.memberService.hasReadingProgress(this.libraryId).pipe(take(1)).subscribe(progress => {
if (!progress) {
this.toggleMenu();
this.toastr.info('Tap the image at any time to open the menu. You can configure different settings or go to page by clicking progress bar. Tap sides of image move to next/prev page.');
}
});
} else {
// If no user, we can't render
this.router.navigateByUrl('/login');
}
});
this.init();
}
ngAfterViewInit() {
if (!this.canvas) {
return;
}
this.ctx = this.canvas.nativeElement.getContext('2d', { alpha: false });
this.canvasImage.onload = () => this.renderPage();
}
ngOnDestroy() {
this.readerService.resetOverrideStyles();
this.navService.showNavBar();
this.onDestroy.next();
this.onDestroy.complete();
this.goToPageEvent.complete();
this.showBookmarkEffectEvent.complete();
this.readerService.exitFullscreen();
}
@HostListener('window:keyup', ['$event'])
handleKeyPress(event: KeyboardEvent) {
switch (this.readerMode) {
case READER_MODE.MANGA_LR:
if (event.key === KEY_CODES.RIGHT_ARROW) {
this.readingDirection === ReadingDirection.LeftToRight ? this.nextPage() : this.prevPage();
} else if (event.key === KEY_CODES.LEFT_ARROW) {
this.readingDirection === ReadingDirection.LeftToRight ? this.prevPage() : this.nextPage();
}
break;
case READER_MODE.MANGA_UD:
case READER_MODE.WEBTOON:
if (event.key === KEY_CODES.DOWN_ARROW) {
this.nextPage()
} else if (event.key === KEY_CODES.UP_ARROW) {
this.prevPage()
}
break;
}
if (event.key === KEY_CODES.ESC_KEY) {
if (this.menuOpen) {
this.toggleMenu();
event.stopPropagation();
event.preventDefault();
return;
}
this.closeReader();
} else if (event.key === KEY_CODES.SPACE) {
this.toggleMenu();
} else if (event.key === KEY_CODES.G) {
const goToPageNum = this.promptForPage();
if (goToPageNum === null) { return; }
this.goToPage(parseInt(goToPageNum.trim(), 10));
} else if (event.key === KEY_CODES.B) {
this.bookmarkPage();
} else if (event.key === KEY_CODES.F) {
this.toggleFullscreen()
}
}
clickOverlayClass(side: 'right' | 'left') {
if (!this.showClickOverlay) {
return '';
}
if (this.readingDirection === ReadingDirection.LeftToRight) {
return side === 'right' ? 'highlight' : 'highlight-2';
}
return side === 'right' ? 'highlight-2' : 'highlight';
}
init() {
this.nextChapterId = CHAPTER_ID_NOT_FETCHED;
this.prevChapterId = CHAPTER_ID_NOT_FETCHED;
this.nextChapterDisabled = false;
this.prevChapterDisabled = false;
this.nextChapterPrefetched = false;
this.pageNum = 0;
this.pagingDirection = PAGING_DIRECTION.FORWARD;
forkJoin({
progress: this.readerService.getProgress(this.chapterId),
chapterInfo: this.readerService.getChapterInfo(this.chapterId),
bookmarks: this.readerService.getBookmarks(this.chapterId),
}).pipe(take(1)).subscribe(results => {
if (this.readingListMode && results.chapterInfo.seriesFormat === MangaFormat.EPUB) {
// Redirect to the book reader.
const params = this.readerService.getQueryParamsObject(this.incognitoMode, this.readingListMode, this.readingListId);
this.router.navigate(['library', results.chapterInfo.libraryId, 'series', results.chapterInfo.seriesId, 'book', this.chapterId], {queryParams: params});
return;
}
this.volumeId = results.chapterInfo.volumeId;
this.maxPages = results.chapterInfo.pages;
let page = results.progress.pageNum;
if (page > this.maxPages) {
page = this.maxPages - 1;
}
this.setPageNum(page);
// Due to change detection rules in Angular, we need to re-create the options object to apply the change
const newOptions: Options = Object.assign({}, this.pageOptions);
newOptions.ceil = this.maxPages - 1; // We -1 so that the slider UI shows us hitting the end, since visually we +1 everything.
this.pageOptions = newOptions;
this.libraryService.getLibraryType(results.chapterInfo.libraryId).pipe(take(1)).subscribe(type => {
this.libraryType = type;
this.updateTitle(results.chapterInfo, type);
});
// From bookmarks, create map of pages to make lookup time O(1)
this.bookmarks = {};
results.bookmarks.forEach(bookmark => {
this.bookmarks[bookmark.page] = 1;
});
this.readerService.getNextChapter(this.seriesId, this.volumeId, this.chapterId, this.readingListId).pipe(take(1)).subscribe(chapterId => {
this.nextChapterId = chapterId;
if (chapterId === CHAPTER_ID_DOESNT_EXIST || chapterId === this.chapterId) {
this.nextChapterDisabled = true;
}
});
this.readerService.getPrevChapter(this.seriesId, this.volumeId, this.chapterId, this.readingListId).pipe(take(1)).subscribe(chapterId => {
this.prevChapterId = chapterId;
if (chapterId === CHAPTER_ID_DOESNT_EXIST || chapterId === this.chapterId) {
this.prevChapterDisabled = true;
}
});
const images = [];
for (let i = 0; i < PREFETCH_PAGES + 2; i++) {
images.push(new Image());
}
this.cachedImages = new CircularArray<HTMLImageElement>(images, 0);
this.render();
}, () => {
setTimeout(() => {
this.closeReader();
}, 200);
});
}
render() {
if (this.readerMode === READER_MODE.WEBTOON) {
this.isLoading = false;
} else {
this.loadPage();
}
}
closeReader() {
if (this.readingListMode) {
this.router.navigateByUrl('lists/' + this.readingListId);
} else {
this.location.back();
}
}
updateTitle(chapterInfo: ChapterInfo, type: LibraryType) {
this.title = chapterInfo.seriesName;
if (chapterInfo.chapterTitle != null && chapterInfo.chapterTitle.length > 0) {
this.title += ' - ' + chapterInfo.chapterTitle;
}
this.subtitle = '';
if (chapterInfo.isSpecial && chapterInfo.volumeNumber === '0') {
this.subtitle = chapterInfo.fileName;
} else if (!chapterInfo.isSpecial && chapterInfo.volumeNumber === '0') {
this.subtitle = this.utilityService.formatChapterName(type, true, true) + chapterInfo.chapterNumber;
} else {
this.subtitle = 'Volume ' + chapterInfo.volumeNumber;
if (chapterInfo.chapterNumber !== '0') {
this.subtitle += ' ' + this.utilityService.formatChapterName(type, true, true) + chapterInfo.chapterNumber;
}
}
}
translateScalingOption(option: ScalingOption) {
switch (option) {
case (ScalingOption.Automatic):
{
const windowWidth = window.innerWidth
|| document.documentElement.clientWidth
|| document.body.clientWidth;
const windowHeight = window.innerHeight
|| document.documentElement.clientHeight
|| document.body.clientHeight;
const ratio = windowWidth / windowHeight;
if (windowHeight > windowWidth) {
return FITTING_OPTION.WIDTH;
}
if (windowWidth >= windowHeight || ratio > 1.0) {
return FITTING_OPTION.HEIGHT;
}
return FITTING_OPTION.WIDTH;
}
case (ScalingOption.FitToHeight):
return FITTING_OPTION.HEIGHT;
case (ScalingOption.FitToWidth):
return FITTING_OPTION.WIDTH;
default:
return FITTING_OPTION.ORIGINAL;
}
}
getFittingOptionClass() {
const formControl = this.generalSettingsForm.get('fittingOption');
if (formControl === undefined) {
return FITTING_OPTION.HEIGHT;
}
return formControl?.value;
}
getFittingIcon() {
const value = this.getFit();
switch(value) {
case FITTING_OPTION.HEIGHT:
return 'fa-arrows-alt-v';
case FITTING_OPTION.WIDTH:
return 'fa-arrows-alt-h';
case FITTING_OPTION.ORIGINAL:
return 'fa-expand-arrows-alt';
}
}
getFit() {
let value = FITTING_OPTION.HEIGHT;
const formControl = this.generalSettingsForm.get('fittingOption');
if (formControl !== undefined) {
value = formControl?.value;
}
return value;
}
cancelMenuCloseTimer() {
if (this.menuTimeout) {
clearTimeout(this.menuTimeout);
}
}
/**
* Whenever the menu is interacted with, restart the timer. However if the settings menu is open, don't restart, just cancel the timeout.
*/
resetMenuCloseTimer() {
if (this.menuTimeout) {
clearTimeout(this.menuTimeout);
if (!this.settingsOpen && this.autoCloseMenu) {
this.startMenuCloseTimer();
}
}
}
startMenuCloseTimer() {
if (!this.autoCloseMenu) { return; }
this.menuTimeout = setTimeout(() => {
this.toggleMenu();
}, OVERLAY_AUTO_CLOSE_TIME);
}
toggleMenu() {
this.menuOpen = !this.menuOpen;
if (this.menuTimeout) {
clearTimeout(this.menuTimeout);
}
if (this.menuOpen && !this.settingsOpen) {
this.startMenuCloseTimer();
} else {
this.showClickOverlay = false;
this.settingsOpen = false;
}
}
isSplitLeftToRight() {
return parseInt(this.generalSettingsForm?.get('pageSplitOption')?.value, 10) === PageSplitOption.SplitLeftToRight;
}
/**
*
* @returns If the current model reflects no split of fit split
* @remarks Fit to Screen falls under no split
*/
isNoSplit() {
const splitValue = parseInt(this.generalSettingsForm?.get('pageSplitOption')?.value, 10);
return splitValue === PageSplitOption.NoSplit || splitValue === PageSplitOption.FitSplit;
}
updateSplitPage() {
const needsSplitting = this.isCoverImage();
if (!needsSplitting || this.isNoSplit()) {
this.currentImageSplitPart = SPLIT_PAGE_PART.NO_SPLIT;
return;
}
if (this.pagingDirection === PAGING_DIRECTION.FORWARD) {
switch (this.currentImageSplitPart) {
case SPLIT_PAGE_PART.NO_SPLIT:
this.currentImageSplitPart = this.isSplitLeftToRight() ? SPLIT_PAGE_PART.LEFT_PART : SPLIT_PAGE_PART.RIGHT_PART;
break;
case SPLIT_PAGE_PART.LEFT_PART:
const r2lSplittingPart = (needsSplitting ? SPLIT_PAGE_PART.RIGHT_PART : SPLIT_PAGE_PART.NO_SPLIT);
this.currentImageSplitPart = this.isSplitLeftToRight() ? SPLIT_PAGE_PART.RIGHT_PART : r2lSplittingPart;
break;
case SPLIT_PAGE_PART.RIGHT_PART:
const l2rSplittingPart = (needsSplitting ? SPLIT_PAGE_PART.LEFT_PART : SPLIT_PAGE_PART.NO_SPLIT);
this.currentImageSplitPart = this.isSplitLeftToRight() ? l2rSplittingPart : SPLIT_PAGE_PART.LEFT_PART;
break;
}
} else if (this.pagingDirection === PAGING_DIRECTION.BACKWARDS) {
switch (this.currentImageSplitPart) {
case SPLIT_PAGE_PART.NO_SPLIT:
this.currentImageSplitPart = this.isSplitLeftToRight() ? SPLIT_PAGE_PART.RIGHT_PART : SPLIT_PAGE_PART.LEFT_PART;
break;
case SPLIT_PAGE_PART.LEFT_PART:
const l2rSplittingPart = (needsSplitting ? SPLIT_PAGE_PART.RIGHT_PART : SPLIT_PAGE_PART.NO_SPLIT);
this.currentImageSplitPart = this.isSplitLeftToRight() ? l2rSplittingPart : SPLIT_PAGE_PART.RIGHT_PART;
break;
case SPLIT_PAGE_PART.RIGHT_PART:
this.currentImageSplitPart = this.isSplitLeftToRight() ? SPLIT_PAGE_PART.LEFT_PART : (needsSplitting ? SPLIT_PAGE_PART.LEFT_PART : SPLIT_PAGE_PART.NO_SPLIT);
break;
}
}
}
handlePageChange(event: any, direction: string) {
if (this.readerMode === READER_MODE.WEBTOON) {
if (direction === 'right') {
this.nextPage(event);
} else {
this.prevPage(event);
}
return;
}
if (direction === 'right') {
this.readingDirection === ReadingDirection.LeftToRight ? this.nextPage(event) : this.prevPage(event);
} else if (direction === 'left') {
this.readingDirection === ReadingDirection.LeftToRight ? this.prevPage(event) : this.nextPage(event);
}
}
nextPage(event?: any) {
if (event) {
event.stopPropagation();
event.preventDefault();
}
const notInSplit = this.currentImageSplitPart !== (this.isSplitLeftToRight() ? SPLIT_PAGE_PART.LEFT_PART : SPLIT_PAGE_PART.RIGHT_PART);
if ((this.pageNum + 1 >= this.maxPages && notInSplit) || this.isLoading) {
if (this.isLoading) { return; }
// Move to next volume/chapter automatically
this.loadNextChapter();
return;
}
this.pagingDirection = PAGING_DIRECTION.FORWARD;
if (this.isNoSplit() || notInSplit) {
this.setPageNum(this.pageNum + 1);
if (this.readerMode !== READER_MODE.WEBTOON) {
this.canvasImage = this.cachedImages.next();
}
}
if (this.readerMode !== READER_MODE.WEBTOON) {
this.loadPage();
}
}
prevPage(event?: any) {
if (event) {
event.stopPropagation();
event.preventDefault();
}
const notInSplit = this.currentImageSplitPart !== (this.isSplitLeftToRight() ? SPLIT_PAGE_PART.RIGHT_PART : SPLIT_PAGE_PART.LEFT_PART);
if ((this.pageNum - 1 < 0 && notInSplit) || this.isLoading) {
if (this.isLoading) { return; }
// Move to next volume/chapter automatically
this.loadPrevChapter();
return;
}
this.pagingDirection = PAGING_DIRECTION.BACKWARDS;
if (this.isNoSplit() || notInSplit) {
this.setPageNum(this.pageNum - 1);
this.canvasImage = this.cachedImages.prev();
}
if (this.readerMode !== READER_MODE.WEBTOON) {
this.loadPage();
}
}
loadNextChapter() {
if (this.nextPageDisabled) { return; }
if (this.nextChapterDisabled) { return; }
this.isLoading = true;
if (this.nextChapterId === CHAPTER_ID_NOT_FETCHED || this.nextChapterId === this.chapterId) {
this.readerService.getNextChapter(this.seriesId, this.volumeId, this.chapterId, this.readingListId).pipe(take(1)).subscribe(chapterId => {
this.nextChapterId = chapterId;
this.loadChapter(chapterId, 'Next');
});
} else {
this.loadChapter(this.nextChapterId, 'Next');
}
}
loadPrevChapter() {
if (this.prevPageDisabled) { return; }
if (this.prevChapterDisabled) { return; }
this.isLoading = true;
this.continuousChaptersStack.pop();
const prevChapter = this.continuousChaptersStack.peek();
if (prevChapter != this.chapterId) {
if (prevChapter !== undefined) {
this.chapterId = prevChapter;
this.init();
return;
}
}
if (this.prevChapterId === CHAPTER_ID_NOT_FETCHED || this.prevChapterId === this.chapterId) {
this.readerService.getPrevChapter(this.seriesId, this.volumeId, this.chapterId, this.readingListId).pipe(take(1)).subscribe(chapterId => {
this.prevChapterId = chapterId;
this.loadChapter(chapterId, 'Prev');
});
} else {
this.loadChapter(this.prevChapterId, 'Prev');
}
}
loadChapter(chapterId: number, direction: 'Next' | 'Prev') {
if (chapterId >= 0) {
this.chapterId = chapterId;
this.continuousChaptersStack.push(chapterId);
// Load chapter Id onto route but don't reload
const newRoute = this.readerService.getNextChapterUrl(this.router.url, this.chapterId, this.incognitoMode, this.readingListMode, this.readingListId);
window.history.replaceState({}, '', newRoute);
this.init();
this.toastr.info(direction + ' ' + this.utilityService.formatChapterName(this.libraryType).toLowerCase() + ' loaded', '', {timeOut: 3000});
} else {
// This will only happen if no actual chapter can be found
this.toastr.warning('Could not find ' + direction.toLowerCase() + ' ' + this.utilityService.formatChapterName(this.libraryType).toLowerCase());
this.isLoading = false;
if (direction === 'Prev') {
this.prevPageDisabled = true;
} else {
this.nextPageDisabled = true;
}
}
}
/**
* There are some hard limits on the size of canvas' that we must cap at. https://github.com/jhildenbiddle/canvas-size#test-results
* For Safari, it's 16,777,216, so we cap at 4096x4096 when this happens. The drawImage in render will perform bi-cubic scaling for us.
* @returns If we should continue to the render loop
*/
setCanvasSize() {
if (this.ctx && this.canvas) {
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore
const isSafari = [
'iPad Simulator',
'iPhone Simulator',
'iPod Simulator',
'iPad',
'iPhone',
'iPod'
].includes(navigator.platform)
// iPad on iOS 13 detection
|| (navigator.userAgent.includes("Mac") && "ontouchend" in document);
const canvasLimit = isSafari ? 16_777_216 : 124_992_400;
const needsScaling = this.canvasImage.width * this.canvasImage.height > canvasLimit;
if (needsScaling) {
this.canvas.nativeElement.width = isSafari ? 4_096 : 16_384;
this.canvas.nativeElement.height = isSafari ? 4_096 : 16_384;
} else {
this.canvas.nativeElement.width = this.canvasImage.width;
this.canvas.nativeElement.height = this.canvasImage.height;
}
}
}
renderPage() {
if (!this.ctx || !this.canvas) { return; }
this.canvasImage.onload = null;
this.setCanvasSize();
const needsSplitting = this.isCoverImage();
this.updateSplitPage();
if (needsSplitting && this.currentImageSplitPart === SPLIT_PAGE_PART.LEFT_PART) {
this.canvas.nativeElement.width = this.canvasImage.width / 2;
this.ctx.drawImage(this.canvasImage, 0, 0, this.canvasImage.width, this.canvasImage.height, 0, 0, this.canvasImage.width, this.canvasImage.height);
} else if (needsSplitting && this.currentImageSplitPart === SPLIT_PAGE_PART.RIGHT_PART) {
this.canvas.nativeElement.width = this.canvasImage.width / 2;
this.ctx.drawImage(this.canvasImage, 0, 0, this.canvasImage.width, this.canvasImage.height, -this.canvasImage.width / 2, 0, this.canvasImage.width, this.canvasImage.height);
} else {
if (!this.firstPageRendered && this.scalingOption === ScalingOption.Automatic) {
this.updateScalingForFirstPageRender();
}
// Fit Split on a page that needs splitting
if (!this.shouldRenderAsFitSplit()) {
this.setCanvasSize();
this.ctx.drawImage(this.canvasImage, 0, 0);
this.isLoading = false;
return;
}
const windowWidth = window.innerWidth
|| document.documentElement.clientWidth
|| document.body.clientWidth;
const windowHeight = window.innerHeight
|| document.documentElement.clientHeight
|| document.body.clientHeight;
// If the user's screen is wider than the image, just pretend this is no split, as it will render nicer
this.canvas.nativeElement.width = windowWidth;
this.canvas.nativeElement.height = windowHeight;
const ratio = this.canvasImage.width / this.canvasImage.height;
let newWidth = windowWidth;
let newHeight = newWidth / ratio;
if (newHeight > windowHeight) {
newHeight = windowHeight;
newWidth = newHeight * ratio;
}
// Optimization: When the screen is larger than newWidth, allow no split rendering to occur for a better fit
if (windowWidth > newWidth) {
this.setCanvasSize();
this.ctx.drawImage(this.canvasImage, 0, 0);
} else {
this.ctx.fillRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
this.ctx.drawImage(this.canvasImage, 0, 0, newWidth, newHeight);
}
}
// Reset scroll on non HEIGHT Fits
if (this.getFit() !== FITTING_OPTION.HEIGHT) {
window.scrollTo(0, 0);
}
this.isLoading = false;
}
updateScalingForFirstPageRender() {
const windowWidth = window.innerWidth
|| document.documentElement.clientWidth
|| document.body.clientWidth;
const windowHeight = window.innerHeight
|| document.documentElement.clientHeight
|| document.body.clientHeight;
const needsSplitting = this.isCoverImage();
let newScale = this.generalSettingsForm.get('fittingOption')?.value;
const widthRatio = windowWidth / (this.canvasImage.width / (needsSplitting ? 2 : 1));
const heightRatio = windowHeight / (this.canvasImage.height);
// Given that we now have image dimensions, assuming this isn't a split image,
// Try to reset one time based on who's dimension (width/height) is smaller
if (widthRatio < heightRatio) {
newScale = FITTING_OPTION.WIDTH;
} else if (widthRatio > heightRatio) {
newScale = FITTING_OPTION.HEIGHT;
}
this.firstPageRendered = true;
this.generalSettingsForm.get('fittingOption')?.setValue(newScale, {emitEvent: false});
}
isCoverImage() {
return this.canvasImage.width > this.canvasImage.height;
}
shouldRenderAsFitSplit() {
// Some pages aren't cover images but might need fit split renderings
if (parseInt(this.generalSettingsForm?.get('pageSplitOption')?.value, 10) !== PageSplitOption.FitSplit) return false;
//if (!this.isCoverImage() || parseInt(this.generalSettingsForm?.get('pageSplitOption')?.value, 10) !== PageSplitOption.FitSplit) return false;
return true;
}
prefetch() {
let index = 1;
this.cachedImages.applyFor((item, internalIndex) => {
const offsetIndex = this.pageNum + index;
const urlPageNum = this.readerService.imageUrlToPageNum(item.src);
if (urlPageNum === offsetIndex) {
index += 1;
return;
}
if (offsetIndex < this.maxPages - 1) {
item.src = this.readerService.getPageUrl(this.chapterId, offsetIndex);
index += 1;
}
}, this.cachedImages.size() - 3);
}
loadPage() {
if (!this.canvas || !this.ctx) { return; }
this.isLoading = true;
this.canvasImage = this.cachedImages.current();
if (this.readerService.imageUrlToPageNum(this.canvasImage.src) !== this.pageNum || this.canvasImage.src === '' || !this.canvasImage.complete) {
this.canvasImage.src = this.readerService.getPageUrl(this.chapterId, this.pageNum);
this.canvasImage.onload = () => this.renderPage();
} else {
this.renderPage();
}
this.prefetch();
}
setReadingDirection() {
if (this.readingDirection === ReadingDirection.LeftToRight) {
this.readingDirection = ReadingDirection.RightToLeft;
} else {
this.readingDirection = ReadingDirection.LeftToRight;
}
if (this.menuOpen) {
this.showClickOverlay = true;
setTimeout(() => {
this.showClickOverlay = false;
}, CLICK_OVERLAY_TIMEOUT);
}
}
sliderDragUpdate(context: ChangeContext) {
// This will update the value for value except when in webtoon due to how the webtoon reader
// responds to page changes
if (this.readerMode !== READER_MODE.WEBTOON) {
this.setPageNum(context.value);
}
}
sliderPageUpdate(context: ChangeContext) {
const page = context.value;
if (page > this.pageNum) {
this.pagingDirection = PAGING_DIRECTION.FORWARD;
} else {
this.pagingDirection = PAGING_DIRECTION.BACKWARDS;
}
this.setPageNum(page);
this.refreshSlider.emit();
this.goToPageEvent.next(page);
this.render();
}
setPageNum(pageNum: number) {
this.pageNum = pageNum;
if (this.pageNum >= this.maxPages - 10) {
// Tell server to cache the next chapter
if (this.nextChapterId > 0 && !this.nextChapterPrefetched) {
this.readerService.getChapterInfo(this.nextChapterId).pipe(take(1)).subscribe(res => {
this.nextChapterPrefetched = true;
});
}
} else if (this.pageNum <= 10) {
if (this.prevChapterId > 0 && !this.prevChapterPrefetched) {
this.readerService.getChapterInfo(this.prevChapterId).pipe(take(1)).subscribe(res => {
this.prevChapterPrefetched = true;
});
}
}
// Due to the fact that we start at image 0, but page 1, we need the last page to have progress as page + 1 to be completed
let tempPageNum = this.pageNum;
if (this.pageNum == this.maxPages - 1 && this.pagingDirection === PAGING_DIRECTION.FORWARD) {
tempPageNum = this.pageNum + 1;
}
if (!this.incognitoMode) {
this.readerService.saveProgress(this.seriesId, this.volumeId, this.chapterId, tempPageNum).pipe(take(1)).subscribe(() => {/* No operation */});
}
}
goToPage(pageNum: number) {
let page = pageNum;
if (page === undefined || this.pageNum === page) { return; }
if (page > this.maxPages) {
page = this.maxPages;
} else if (page < 0) {
page = 0;
}
if (!(page === 0 || page === this.maxPages - 1)) {
page -= 1;
}
if (page > this.pageNum) {
this.pagingDirection = PAGING_DIRECTION.FORWARD;
} else {
this.pagingDirection = PAGING_DIRECTION.BACKWARDS;
}
this.setPageNum(page);
this.goToPageEvent.next(page);
this.render();
}
promptForPage() {
const goToPageNum = window.prompt('There are ' + this.maxPages + ' pages. What page would you like to go to?', '');
if (goToPageNum === null || goToPageNum.trim().length === 0) { return null; }
return goToPageNum;
}
toggleFullscreen() {
this.isFullscreen = this.readerService.checkFullscreenMode();
if (this.isFullscreen) {
this.readerService.exitFullscreen(() => {
this.isFullscreen = false;
this.firstPageRendered = false;
this.fullscreenEvent.next(false);
this.render();
});
} else {
this.readerService.enterFullscreen(this.reader.nativeElement, () => {
this.isFullscreen = true;
this.firstPageRendered = false;
this.fullscreenEvent.next(true);
this.render();
});
}
}
toggleReaderMode() {
switch(this.readerMode) {
case READER_MODE.MANGA_LR:
this.readerMode = READER_MODE.MANGA_UD;
this.pagingDirection = PAGING_DIRECTION.FORWARD;
break;
case READER_MODE.MANGA_UD:
this.readerMode = READER_MODE.WEBTOON;
break;
case READER_MODE.WEBTOON:
this.readerMode = READER_MODE.MANGA_LR;
break;
}
this.updateForm();
this.render();
}
updateForm() {
if ( this.readerMode === READER_MODE.WEBTOON) {
this.generalSettingsForm.get('fittingOption')?.disable()
this.generalSettingsForm.get('pageSplitOption')?.disable();
} else {
this.generalSettingsForm.get('fittingOption')?.enable()
this.generalSettingsForm.get('pageSplitOption')?.enable();
}
}
handleWebtoonPageChange(updatedPageNum: number) {
this.setPageNum(updatedPageNum);
}
/**
* Bookmarks the current page for the chapter
*/
bookmarkPage() {
const pageNum = this.pageNum;
if (this.pageBookmarked) {
this.readerService.unbookmark(this.seriesId, this.volumeId, this.chapterId, pageNum).pipe(take(1)).subscribe(() => {
delete this.bookmarks[pageNum];
});
} else {
this.readerService.bookmark(this.seriesId, this.volumeId, this.chapterId, pageNum).pipe(take(1)).subscribe(() => {
this.bookmarks[pageNum] = 1;
});
}
// Show an effect on the image to show that it was bookmarked
this.showBookmarkEffectEvent.next(pageNum);
if (this.readerMode != READER_MODE.WEBTOON) {
if (this.canvas) {
this.renderer.addClass(this.canvas?.nativeElement, 'bookmark-effect');
setTimeout(() => {
this.renderer.removeClass(this.canvas?.nativeElement, 'bookmark-effect');
}, 1000);
}
}
}
/**
* Turns off Incognito mode. This can only happen once if the user clicks the icon. This will modify URL state
*/
turnOffIncognito() {
this.incognitoMode = false;
const newRoute = this.readerService.getNextChapterUrl(this.router.url, this.chapterId, this.incognitoMode, this.readingListMode, this.readingListId);
window.history.replaceState({}, '', newRoute);
this.toastr.info('Incognito mode is off. Progress will now start being tracked.');
this.readerService.saveProgress(this.seriesId, this.volumeId, this.chapterId, this.pageNum).pipe(take(1)).subscribe(() => {/* No operation */});
}
getWindowDimensions() {
const windowWidth = window.innerWidth
|| document.documentElement.clientWidth
|| document.body.clientWidth;
const windowHeight = window.innerHeight
|| document.documentElement.clientHeight
|| document.body.clientHeight;
return [windowWidth, windowHeight];
}
}