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FolioReaderCenter.swift
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FolioReaderCenter.swift
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//
// FolioReaderCenter.swift
// FolioReaderKit
//
// Created by Heberti Almeida on 08/04/15.
// Copyright (c) 2015 Folio Reader. All rights reserved.
//
import UIKit
import ZFDragableModalTransition
/// Protocol which is used from `FolioReaderCenter`s.
@objc public protocol FolioReaderCenterDelegate: class {
/// Notifies that a page appeared. This is triggered when a page is chosen and displayed.
///
/// - Parameter page: The appeared page
@objc optional func pageDidAppear(_ page: FolioReaderPage)
/// Passes and returns the HTML content as `String`. Implement this method if you want to modify the HTML content of a `FolioReaderPage`.
///
/// - Parameters:
/// - page: The `FolioReaderPage`.
/// - htmlContent: The current HTML content as `String`.
/// - Returns: The adjusted HTML content as `String`. This is the content which will be loaded into the given `FolioReaderPage`.
@objc optional func htmlContentForPage(_ page: FolioReaderPage, htmlContent: String) -> String
/// Notifies that a page changed. This is triggered when collection view cell is changed.
///
/// - Parameter pageNumber: The appeared page item
@objc optional func pageItemChanged(_ pageNumber: Int)
}
/// The base reader class
open class FolioReaderCenter: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
/// This delegate receives the events from the current `FolioReaderPage`s delegate.
open weak var delegate: FolioReaderCenterDelegate?
/// This delegate receives the events from current page
open weak var pageDelegate: FolioReaderPageDelegate?
/// The base reader container
open weak var readerContainer: FolioReaderContainer?
/// The current visible page on reader
open fileprivate(set) var currentPage: FolioReaderPage?
/// The collection view with pages
open var collectionView: UICollectionView!
let collectionViewLayout = UICollectionViewFlowLayout()
var loadingView: UIActivityIndicatorView!
var pages: [String]!
var totalPages: Int = 0
var tempFragment: String?
var animator: ZFModalTransitionAnimator!
var pageIndicatorView: FolioReaderPageIndicator?
var pageIndicatorHeight: CGFloat = 20
var recentlyScrolled = false
var recentlyScrolledDelay = 2.0 // 2 second delay until we clear recentlyScrolled
var recentlyScrolledTimer: Timer!
var scrollScrubber: ScrollScrubber?
var activityIndicator = UIActivityIndicatorView()
var isScrolling = false
var pageScrollDirection = ScrollDirection()
var nextPageNumber: Int = 0
var previousPageNumber: Int = 0
var currentPageNumber: Int = 0
var pageWidth: CGFloat = 0.0
var pageHeight: CGFloat = 0.0
// tool bar
let toolBarViewController = ToolBarViewController()
var toolBarAnchor: NSLayoutConstraint?
var isShowingToolBar: Bool {
return toolBarAnchor?.constant == 0
}
var pageIds: [String] {
return book.spine.spineReferences.map { $0.resource.id }.compactMap { $0 }
}
// drawable
let drawableViewController = DrawableViewController()
// Dictionary to store images [page number: image]
var pageDrawings: [Int: UIImage] = [:]
// current layers (filters)
private var items: LayersTableViewController.Items = .none {
willSet(newValue) {
currentPage?.applyLayer(items: newValue)
}
}
fileprivate var screenBounds: CGRect!
fileprivate var pointNow = CGPoint.zero
fileprivate var pageOffsetRate: CGFloat = 0
fileprivate var tempReference: FRTocReference?
fileprivate var isFirstLoad = true
fileprivate var currentWebViewScrollPositions = [Int: CGPoint]()
fileprivate var currentOrientation: UIInterfaceOrientation?
fileprivate var readerConfig: FolioReaderConfig {
guard let readerContainer = readerContainer else { return FolioReaderConfig() }
return readerContainer.readerConfig
}
fileprivate var book: FRBook {
guard let readerContainer = readerContainer else { return FRBook() }
return readerContainer.book
}
fileprivate var folioReader: FolioReader {
guard let readerContainer = readerContainer else { return FolioReader() }
return readerContainer.folioReader
}
fileprivate var contentId: Int {
guard let readerContainer = readerContainer else { return 0 }
return readerContainer.contentId
}
// MARK: - Init
init(withContainer readerContainer: FolioReaderContainer) {
self.readerContainer = readerContainer
super.init(nibName: nil, bundle: Bundle.frameworkBundle())
self.initialization()
}
required public init?(coder aDecoder: NSCoder) {
fatalError("This class doesn't support NSCoding.")
}
/**
Common Initialization
*/
fileprivate func initialization() {
if (self.readerConfig.hideBars == true) {
self.pageIndicatorHeight = 0
}
self.totalPages = book.spine.spineReferences.count
// Loading indicator
let style: UIActivityIndicatorView.Style = folioReader.isNight(.white, .gray)
loadingView = UIActivityIndicatorView(style: style)
loadingView.hidesWhenStopped = true
loadingView.startAnimating()
self.view.addSubview(loadingView)
}
// MARK: - View life cicle
override open func viewDidLoad() {
super.viewDidLoad()
screenBounds = self.getScreenBounds()
setPageSize(UIApplication.shared.statusBarOrientation)
// Layout
collectionViewLayout.sectionInset = UIEdgeInsets.zero
collectionViewLayout.minimumLineSpacing = 0
collectionViewLayout.minimumInteritemSpacing = 0
collectionViewLayout.scrollDirection = .direction(withConfiguration: self.readerConfig)
let background = folioReader.isNight(self.readerConfig.nightModeBackground, UIColor.white)
view.backgroundColor = background
// CollectionView
collectionView = UICollectionView(frame: screenBounds, collectionViewLayout: collectionViewLayout)
collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
collectionView.delegate = self
collectionView.dataSource = self
collectionView.isPagingEnabled = true
collectionView.showsVerticalScrollIndicator = false
collectionView.showsHorizontalScrollIndicator = false
collectionView.backgroundColor = background
collectionView.decelerationRate = UIScrollView.DecelerationRate.fast
enableScrollBetweenChapters(scrollEnabled: true)
view.addSubview(collectionView)
if #available(iOS 11.0, *) {
collectionView.contentInsetAdjustmentBehavior = .never
}
// Activity Indicator
self.activityIndicator.style = .gray
self.activityIndicator.hidesWhenStopped = true
self.activityIndicator = UIActivityIndicatorView(frame: CGRect(x: screenBounds.size.width/2, y: screenBounds.size.height/2, width: 30, height: 30))
self.activityIndicator.backgroundColor = UIColor.gray
self.view.addSubview(self.activityIndicator)
self.view.bringSubviewToFront(self.activityIndicator)
if #available(iOS 10.0, *) {
collectionView.isPrefetchingEnabled = false
}
// Register cell classes
collectionView?.register(FolioReaderPage.self, forCellWithReuseIdentifier: kReuseCellIdentifier)
// Configure navigation bar and layout
extendedLayoutIncludesOpaqueBars = true
configureNavBar()
// Page indicator view
if (self.readerConfig.hidePageIndicator == false) {
let frame = self.frameForPageIndicatorView()
pageIndicatorView = FolioReaderPageIndicator(frame: frame, readerConfig: readerConfig, folioReader: folioReader)
if let pageIndicatorView = pageIndicatorView {
view.addSubview(pageIndicatorView)
}
}
guard let readerContainer = readerContainer else { return }
self.scrollScrubber = ScrollScrubber(frame: frameForScrollScrubber(), withReaderContainer: readerContainer)
self.scrollScrubber?.delegate = self
if let scrollScrubber = scrollScrubber {
view.addSubview(scrollScrubber.slider)
}
setupToolBar()
folioReader.delegate = self
setupCanvasView()
}
override open func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
configureNavBar()
showBars()
// Update pages
pagesForCurrentPage(currentPage)
pageIndicatorView?.reloadView(updateShadow: true)
}
override open func viewDidLayoutSubviews() {
super.viewDidLayoutSubviews()
screenBounds = self.getScreenBounds()
loadingView.center = view.center
setPageSize(UIApplication.shared.statusBarOrientation)
updateSubviewFrames()
}
// MARK: -- Toolbar
private func setupToolBar() {
addChild(toolBarViewController)
toolBarViewController.didMove(toParent: self)
toolBarViewController.toolSelected = { tool in
switch tool {
case .penOptions(let button):
self.showPencilOptions(from: button)
case .eraseOptions(let button):
self.showEraserOptions(from: button)
case .highlightOptions(button: let button):
self.showHighlighterOptions(from: button)
case .shapeOptions(button: let button):
self.showShapeOptions(from: button)
default:
self.setCanvasView(tool: tool)
}
}
view.addSubview(toolBarViewController.view)
toolBarViewController.view.translatesAutoresizingMaskIntoConstraints = false
toolBarViewController.view.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
toolBarViewController.view.trailingAnchor.constraint(equalTo: view.trailingAnchor).isActive = true
toolBarViewController.view.heightAnchor.constraint(equalToConstant: ToolBarViewController.toolbarHeight).isActive = true
toolBarAnchor = toolBarViewController.view.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: ToolBarViewController.toolbarHeight)
toolBarAnchor?.isActive = true
}
func toolBar(isHidden: Bool) {
if isHidden == false {
guard pageIds[currentPageNumber - 1].number != nil else {
return
}
setStrokes(forPage: currentPageNumber)
setCanvasView(tool: .none)
} else {
drawableViewController.view.isHidden = true
}
toolBarAnchor?.isActive = false
toolBarAnchor?.constant = isHidden ? ToolBarViewController.toolbarHeight : 0
toolBarAnchor?.isActive = true
UIView.animate(withDuration: 0.3) {
self.view.layoutIfNeeded()
}
}
// MARK: -- Pencil Options
private func showPencilOptions(from button: UIButton) {
guard let strokeFormatViewController = UIStoryboard(name: "StrokeFormatMenu", bundle: Bundle(for: StrokeFormatMenuTableViewController.self)).instantiateInitialViewController() as? StrokeFormatMenuTableViewController else { return }
setCanvasView(tool: .pen)
strokeFormatViewController.selectedStrokeColor = { color in
self.drawableViewController.strokeColor = color
}
strokeFormatViewController.selectedStrokeThickness = { thickness in
self.drawableViewController.thinkness = thickness
}
if let toolSelected = ToolState.toolState(for: self.book.name ?? "", configuration: self.readerConfig) {
strokeFormatViewController.currentColor = UIColor.hexStringToUIColor(hex: toolSelected.colorHex)
strokeFormatViewController.currrentThinkness = toolSelected.thickness
}
strokeFormatViewController.modalPresentationStyle = .popover
strokeFormatViewController.preferredContentSize = CGSize(width: StrokeFormatMenuTableViewController.viewWidth, height: StrokeFormatMenuTableViewController.viewHeight)
strokeFormatViewController.popoverPresentationController?.permittedArrowDirections = .any
strokeFormatViewController.popoverPresentationController?.sourceView = button
strokeFormatViewController.popoverPresentationController?.sourceRect = CGRect(x: button.bounds.midX, y: button.bounds.minY, width: 0, height: 0)
strokeFormatViewController.saveState = { (color, thickness) in
ToolState.store(color: color, thickness: thickness, bookId: self.book.name ?? "", configuration: self.readerConfig)
}
navigationController?.present(strokeFormatViewController, animated: true, completion: nil)
}
// MARK: -- Eraser Options
private func showEraserOptions(from button: UIButton) {
guard let eraserMenuViewController = UIStoryboard(name: "EraserMenu", bundle: Bundle(for: EraserMenuViewController.self)).instantiateInitialViewController() as? EraserMenuViewController else { return }
setCanvasView(tool: .eraser)
eraserMenuViewController.modalPresentationStyle = .popover
eraserMenuViewController.preferredContentSize = CGSize(width: 300, height: 100)
eraserMenuViewController.popoverPresentationController?.permittedArrowDirections = .any
eraserMenuViewController.popoverPresentationController?.sourceView = button
eraserMenuViewController.popoverPresentationController?.sourceRect = CGRect(x: button.bounds.midX, y: button.bounds.minY, width: 0, height: 0)
eraserMenuViewController.selectedEraserThickness = { thikness in
self.drawableViewController.eraseWidth = thikness
}
navigationController?.present(eraserMenuViewController, animated: true, completion: nil)
}
// MARK: - Highlighter Options -
private func showHighlighterOptions(from button: UIButton) {
guard let highlighterMenuViewController = UIStoryboard(name: "HighlighterMenu", bundle: Bundle(for: HighlighterMenuViewController.self)).instantiateInitialViewController() as? HighlighterMenuViewController else { return }
setCanvasView(tool: .highlighter)
highlighterMenuViewController.currentColor = HighlightStyle(rawValue: folioReader.currentHighlightStyle) ?? .yellow
highlighterMenuViewController.modalPresentationStyle = .popover
highlighterMenuViewController.preferredContentSize = CGSize(width: HighlighterMenuViewController.Constants.viewWidth, height: HighlighterMenuViewController.Constants.viewHeight)
highlighterMenuViewController.popoverPresentationController?.permittedArrowDirections = .any
highlighterMenuViewController.popoverPresentationController?.sourceView = button
highlighterMenuViewController.popoverPresentationController?.sourceRect = CGRect(x: button.bounds.midX, y: button.bounds.minY, width: 0, height: 0)
highlighterMenuViewController.selectedColor = { color in
self.folioReader.currentHighlightStyle = color.rawValue
}
navigationController?.present(highlighterMenuViewController, animated: true, completion: nil)
}
// MARK: - Shape Options -
private func showShapeOptions(from button: UIButton) {
guard let shapeMenuViewController = UIStoryboard(name: "ShapeMenu", bundle: Bundle(for: ShapeMenuViewController.self)).instantiateInitialViewController() as? ShapeMenuViewController else { return }
setCanvasView(tool: .shape)
shapeMenuViewController.modalPresentationStyle = .popover
shapeMenuViewController.preferredContentSize = CGSize(width: ShapeMenuViewController.Constants.viewWidth, height: ShapeMenuViewController.Constants.viewHeight)
shapeMenuViewController.popoverPresentationController?.permittedArrowDirections = .any
shapeMenuViewController.popoverPresentationController?.sourceView = button
shapeMenuViewController.popoverPresentationController?.sourceRect = CGRect(x: button.bounds.midX, y: button.bounds.minY, width: 0, height: 0)
shapeMenuViewController.createShape = { [weak self] viewModel in
self?.drawableViewController.drawShape(viewModel: viewModel)
}
shapeMenuViewController.changeShape = { [weak self] viewModel in
self?.drawableViewController.modifyCurrentShape(viewModel: viewModel)
}
shapeMenuViewController.dismissed = { [weak self] in
self?.drawableViewController.deselectCurrentShape()
self?.toolBarViewController.currentTool = .none
}
navigationController?.present(shapeMenuViewController, animated: true, completion: nil)
}
// MARK: -- CanvasView For Drawing
private func setStateFor(tool: ToolBarViewController.Tool) {
switch tool {
case .pen:
drawableViewController.loadToolState(for: self.book.name ?? "", configuration: self.readerConfig)
drawableViewController.strokeColor = UIColor.black
drawableViewController.style = .ink
drawableViewController.pencilStrokeRecognizer.isEnabled = true
case .eraser:
drawableViewController.style = .eraser
drawableViewController.pencilStrokeRecognizer.isEnabled = true
case .highlighter:
drawableViewController.handleSingleTap(self)
default:
drawableViewController.pencilStrokeRecognizer.isEnabled = false
}
}
private func setupCanvasView() {
addChild(drawableViewController)
drawableViewController.didMove(toParent: self)
view.addSubview(drawableViewController.view)
view.bringSubviewToFront(toolBarViewController.view)
drawableViewController.view.isHidden = true
drawableViewController.view.translatesAutoresizingMaskIntoConstraints = false
drawableViewController.view.topAnchor.constraint(equalTo: collectionView.topAnchor).isActive = true
drawableViewController.view.leadingAnchor.constraint(equalTo: collectionView.leadingAnchor).isActive = true
drawableViewController.view.trailingAnchor.constraint(equalTo: collectionView.trailingAnchor).isActive = true
drawableViewController.view.bottomAnchor.constraint(equalTo: collectionView.bottomAnchor).isActive = true
drawableViewController.saveImage = { [weak self] view in
guard let self = self else {
return
}
let persisted = StrokeCollectionPersisted(strokeCollection: self.drawableViewController.strokeCollection)
try? persisted.save(bookId: String(self.contentId), page: self.pageIds[self.currentPageNumber - 1].number ?? 0)
NotificationCenter.default.post(name: .postStrokes, object: self, userInfo: ["strokes": persisted, "contentId": self.contentId, "sectionId": self.pageIds[self.currentPageNumber - 1].number ?? 0])
self.toolBar(isHidden: true)
self.updateCurrentPage()
self.drawableViewController.saveToolState(for: String(self.contentId), configuration: self.readerConfig)
self.toolBarViewController.currentTool = .none
self.items = .none
Drawing.store(pageId: self.pageIds[self.currentPageNumber - 1], bookId:String(self.contentId), configuration: self.readerConfig)
self.setStrokesAndUpdateImageForCurrentPage()
}
drawableViewController.didSelectShape = { [weak self] in
guard let self = self else {
return
}
self.toolBarViewController.currentTool = .shape
self.showShapeOptions(from: self.toolBarViewController.shapeButton)
}
}
private func setCanvasView(tool: ToolBarViewController.Tool) {
currentPage?.drawImageView.isHidden = true
drawableViewController.view.isHidden = false
setStateFor(tool: tool)
}
private func setStrokes(forPage page: Int) {
let strokes = try? StrokeCollectionPersisted.retreiveStrokes(for: String(self.contentId), page: pageIds[page - 1].number ?? 0)
clearCurrentStrokes()
if let strokeCollection = strokes?.strokeCollection() {
drawableViewController.strokeCollection = strokeCollection
}
drawableViewController.view.isHidden = false
let image = UIImage.imageWithLayer(drawableViewController.view.layer)
drawableViewController.view.isHidden = true
self.pageDrawings[page] = image
}
private func setStrokesAndUpdateImageForCurrentPage() {
setStrokes(forPage: currentPageNumber)
self.currentPage?.drawImageView.image = self.pageDrawings[currentPageNumber]
}
private func clearCurrentStrokes() {
drawableViewController.strokeCollection = StrokeCollection()
}
// MARK: Layout
/**
Enable or disable the scrolling between chapters (`FolioReaderPage`s). If this is enabled it's only possible to read the current chapter. If another chapter should be displayed is has to be triggered programmatically with `changePageWith`.
- parameter scrollEnabled: `Bool` which enables or disables the scrolling between `FolioReaderPage`s.
*/
open func enableScrollBetweenChapters(scrollEnabled: Bool) {
self.collectionView.isScrollEnabled = scrollEnabled
}
fileprivate func updateSubviewFrames() {
self.pageIndicatorView?.frame = self.frameForPageIndicatorView()
self.scrollScrubber?.frame = self.frameForScrollScrubber()
}
fileprivate func frameForPageIndicatorView() -> CGRect {
var bounds = CGRect(x: 0, y: screenBounds.size.height-pageIndicatorHeight, width: screenBounds.size.width, height: pageIndicatorHeight)
if #available(iOS 11.0, *) {
bounds.size.height = bounds.size.height + view.safeAreaInsets.bottom
}
return bounds
}
fileprivate func frameForScrollScrubber() -> CGRect {
let scrubberY: CGFloat = ((self.readerConfig.shouldHideNavigationOnTap == true || self.readerConfig.hideBars == true) ? 50 : 74)
return CGRect(x: self.pageWidth + 10, y: scrubberY, width: 40, height: (self.pageHeight - 100))
}
func configureNavBar() {
let navBackground = folioReader.isNight(self.readerConfig.nightModeMenuBackground, UIColor.white)
let tintColor = readerConfig.tintColor
let navText = folioReader.isNight(UIColor.white, UIColor.black)
let font = UIFont(name: "Avenir-Light", size: 17)!
setTranslucentNavigation(color: navBackground, tintColor: tintColor, titleColor: navText, andFont: font)
}
func configureNavBarButtons() {
// Navbar buttons
let closeIcon = UIImage(readerImageNamed: "icon-navbar-close")?.ignoreSystemTint(withConfiguration: self.readerConfig)
let tocIcon = UIImage(readerImageNamed: "icon-navbar-toc")?.ignoreSystemTint(withConfiguration: self.readerConfig)
let menu = UIBarButtonItem(image: closeIcon, style: .plain, target: self, action:#selector(closeReader(_:)))
let toc = UIBarButtonItem(image: tocIcon, style: .plain, target: self, action:#selector(presentChapterList(_:)))
navigationItem.leftBarButtonItems = [menu, toc]
let layerIcon = UIImage(readerImageNamed: "layers-icon")?.ignoreSystemTint(withConfiguration: self.readerConfig)
let layerButton = UIBarButtonItem(image: layerIcon, style: .plain, target: self, action:#selector(showLayers(_:)))
navigationItem.rightBarButtonItem = layerButton
if(self.readerConfig.displayTitle){
navigationItem.title = book.title
}
}
func reloadData() {
self.loadingView.stopAnimating()
self.totalPages = book.spine.spineReferences.count
self.collectionView.reloadData()
self.configureNavBarButtons()
self.setCollectionViewProgressiveDirection()
if self.readerConfig.loadSavedPositionForCurrentBook {
guard let position = folioReader.savedPositionForCurrentBook, let pageNumber = position["pageNumber"] as? Int, pageNumber > 0 else {
self.currentPageNumber = 1
return
}
self.changePageWith(page: pageNumber)
self.currentPageNumber = pageNumber
}
}
// MARK: Change page progressive direction
private func transformViewForRTL(_ view: UIView?) {
if folioReader.needsRTLChange {
view?.transform = CGAffineTransform(scaleX: -1, y: 1)
} else {
view?.transform = CGAffineTransform.identity
}
}
func setCollectionViewProgressiveDirection() {
self.transformViewForRTL(self.collectionView)
}
func setPageProgressiveDirection(_ page: FolioReaderPage) {
self.transformViewForRTL(page)
}
// MARK: Change layout orientation
/// Get internal page offset before layout change
private func updatePageOffsetRate() {
guard let currentPage = self.currentPage, let webView = currentPage.webView else {
return
}
let pageScrollView = webView.scrollView
let contentSize = pageScrollView.contentSize.forDirection(withConfiguration: self.readerConfig)
let contentOffset = pageScrollView.contentOffset.forDirection(withConfiguration: self.readerConfig)
self.pageOffsetRate = (contentSize != 0 ? (contentOffset / contentSize) : 0)
}
func setScrollDirection(_ direction: FolioReaderScrollDirection) {
guard let currentPage = self.currentPage, let webView = currentPage.webView else {
return
}
let pageScrollView = webView.scrollView
// Get internal page offset before layout change
self.updatePageOffsetRate()
// Change layout
self.readerConfig.scrollDirection = direction
self.collectionViewLayout.scrollDirection = .direction(withConfiguration: self.readerConfig)
self.currentPage?.setNeedsLayout()
self.collectionView.collectionViewLayout.invalidateLayout()
self.collectionView.setContentOffset(frameForPage(self.currentPageNumber).origin, animated: false)
// Page progressive direction
self.setCollectionViewProgressiveDirection()
delay(0.2) { self.setPageProgressiveDirection(currentPage) }
/**
* This delay is needed because the page will not be ready yet
* so the delay wait until layout finished the changes.
*/
delay(0.1) {
var pageOffset = (pageScrollView.contentSize.forDirection(withConfiguration: self.readerConfig) * self.pageOffsetRate)
// Fix the offset for paged scroll
if (self.readerConfig.scrollDirection == .horizontal && self.pageWidth != 0) {
let page = round(pageOffset / self.pageWidth)
pageOffset = (page * self.pageWidth)
}
let pageOffsetPoint = self.readerConfig.isDirection(CGPoint(x: 0, y: pageOffset), CGPoint(x: pageOffset, y: 0), CGPoint(x: 0, y: pageOffset))
pageScrollView.setContentOffset(pageOffsetPoint, animated: true)
}
}
// MARK: Status bar and Navigation bar
func hideBars() {
guard self.readerConfig.shouldHideNavigationOnTap == true else {
return
}
self.updateBarsStatus(true)
}
func showBars() {
self.configureNavBar()
self.updateBarsStatus(false)
}
func toggleBars() {
guard self.readerConfig.shouldHideNavigationOnTap == true else {
return
}
let shouldHide = !self.navigationController!.isNavigationBarHidden
if shouldHide == false {
self.configureNavBar()
}
self.updateBarsStatus(shouldHide)
}
private func updateBarsStatus(_ shouldHide: Bool, shouldShowIndicator: Bool = false) {
guard let readerContainer = readerContainer else { return }
readerContainer.shouldHideStatusBar = shouldHide
UIView.animate(withDuration: 0.25, animations: {
readerContainer.setNeedsStatusBarAppearanceUpdate()
// Show minutes indicator
if (shouldShowIndicator == true) {
self.pageIndicatorView?.minutesLabel.alpha = shouldHide ? 0 : 1
}
})
self.navigationController?.setNavigationBarHidden(shouldHide, animated: true)
}
// MARK: UICollectionViewDataSource
open func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
open func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return totalPages
}
open func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let reuseableCell = collectionView.dequeueReusableCell(withReuseIdentifier: kReuseCellIdentifier, for: indexPath) as? FolioReaderPage
return self.configure(readerPageCell: reuseableCell, atIndexPath: indexPath)
}
private func configure(readerPageCell cell: FolioReaderPage?, atIndexPath indexPath: IndexPath) -> UICollectionViewCell {
guard let cell = cell, let readerContainer = readerContainer else {
return UICollectionViewCell()
}
cell.setup(withReaderContainer: readerContainer)
cell.pageNumber = indexPath.row+1
cell.drawImageView.image = nil
if let image = pageDrawings[cell.pageNumber] {
cell.drawImageView.image = image
} else {
setStrokes(forPage: cell.pageNumber)
if let image = pageDrawings[cell.pageNumber] {
cell.drawImageView.image = image
}
}
cell.didAddedHighlights = { [unowned self] highlights in
NotificationCenter.default.post(name: .postHighlight, object: self, userInfo: ["highlights": highlights, "contentId": self.contentId, "sectionId": self.pageIds[self.currentPageNumber - 1].number ?? 0])
}
cell.applyLayer(items: items)
cell.webView?.scrollView.delegate = self
if #available(iOS 11.0, *) {
cell.webView?.scrollView.contentInsetAdjustmentBehavior = .never
}
cell.webView?.setupScrollDirection()
let webViewFrame = cell.webViewFrame()
cell.webView?.frame = webViewFrame
cell.delegate = self
cell.backgroundColor = .clear
setPageProgressiveDirection(cell)
// Configure the cell
let spine = self.book.spine.spineReferences[indexPath.row]
guard var html = spine.html else {
return cell
}
let mediaOverlayStyleColors = "\"\(self.readerConfig.mediaOverlayColor.hexString(false))\", \"\(self.readerConfig.mediaOverlayColor.highlightColor().hexString(false))\""
// Inject CSS
let jsFilePath = Bundle.frameworkBundle().path(forResource: "Bridge", ofType: "js")
let cssFilePath = Bundle.frameworkBundle().path(forResource: "Style", ofType: "css")
let cssTag = "<link rel=\"stylesheet\" type=\"text/css\" href=\"\(cssFilePath!)\">"
let jsTag = "<script type=\"text/javascript\" src=\"\(jsFilePath!)\"></script>" +
"<script type=\"text/javascript\">setMediaOverlayStyleColors(\(mediaOverlayStyleColors))</script>"
let toInject = "\n\(cssTag)\n\(jsTag)\n</head>"
html = html.replacingOccurrences(of: "</head>", with: toInject)
// Font class name
var classes = folioReader.currentFont.cssIdentifier
classes += " " + folioReader.currentMediaOverlayStyle.className()
// Night mode
if folioReader.nightMode {
classes += " nightMode"
}
// Font Size
classes += " \(folioReader.currentFontSize.cssIdentifier)"
html = html.replacingOccurrences(of: "<html ", with: "<html class=\"\(classes)\"")
// Let the delegate adjust the html string
if let modifiedHtmlContent = self.delegate?.htmlContentForPage?(cell, htmlContent: html) {
html = modifiedHtmlContent
}
let fileURL = URL(fileURLWithPath: spine.resource.fullHref)
// Call to loadFileURL is needed in order to allow webkit load local resources as javascript, css and images
// Stored in a different folder where html file is located.
// Also calling loadHTMLString allow us to inject the html with the highlighted words
//
// We are removing the 2 last path component to allow the reading access to the root folder where html file is located since there are some references inside the html as ../resources/image1 and so on.
cell.webView?.loadFileURL(fileURL, allowingReadAccessTo: fileURL.deletingLastPathComponent().deletingLastPathComponent())
cell.loadHTMLString(html, baseURL: fileURL.deletingLastPathComponent())
return cell
}
public func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
let size = CGSize(width: collectionView.frame.width, height: collectionView.frame.height)
if #available(iOS 11.0, *) {
let orientation = UIDevice.current.orientation
if orientation == .portrait || orientation == .portraitUpsideDown {
if readerConfig.scrollDirection == .horizontal {
// size.height = size.height - view.safeAreaInsets.bottom
}
}
}
return size
}
// MARK: - Device rotation
override open func willRotate(to toInterfaceOrientation: UIInterfaceOrientation, duration: TimeInterval) {
guard folioReader.isReaderReady else { return }
setPageSize(toInterfaceOrientation)
updateCurrentPage()
if self.currentOrientation == nil || (self.currentOrientation?.isPortrait != toInterfaceOrientation.isPortrait) {
var pageIndicatorFrame = pageIndicatorView?.frame
pageIndicatorFrame?.origin.y = ((screenBounds.size.height < screenBounds.size.width) ? (self.collectionView.frame.height - pageIndicatorHeight) : (self.collectionView.frame.width - pageIndicatorHeight))
pageIndicatorFrame?.origin.x = 0
pageIndicatorFrame?.size.width = ((screenBounds.size.height < screenBounds.size.width) ? (self.collectionView.frame.width) : (self.collectionView.frame.height))
pageIndicatorFrame?.size.height = pageIndicatorHeight
var scrollScrubberFrame = scrollScrubber?.slider.frame;
scrollScrubberFrame?.origin.x = ((screenBounds.size.height < screenBounds.size.width) ? (screenBounds.size.width - 100) : (screenBounds.size.height + 10))
scrollScrubberFrame?.size.height = ((screenBounds.size.height < screenBounds.size.width) ? (self.collectionView.frame.height - 100) : (self.collectionView.frame.width - 100))
self.collectionView.collectionViewLayout.invalidateLayout()
UIView.animate(withDuration: duration, animations: {
// Adjust page indicator view
if let pageIndicatorFrame = pageIndicatorFrame {
self.pageIndicatorView?.frame = pageIndicatorFrame
self.pageIndicatorView?.reloadView(updateShadow: true)
}
// Adjust scroll scrubber slider
if let scrollScrubberFrame = scrollScrubberFrame {
self.scrollScrubber?.slider.frame = scrollScrubberFrame
}
// Adjust collectionView
self.collectionView.contentSize = self.readerConfig.isDirection(
CGSize(width: self.pageWidth, height: self.pageHeight * CGFloat(self.totalPages)),
CGSize(width: self.pageWidth * CGFloat(self.totalPages), height: self.pageHeight),
CGSize(width: self.pageWidth * CGFloat(self.totalPages), height: self.pageHeight)
)
self.collectionView.setContentOffset(self.frameForPage(self.currentPageNumber).origin, animated: false)
self.collectionView.collectionViewLayout.invalidateLayout()
// Adjust internal page offset
self.updatePageOffsetRate()
})
}
self.currentOrientation = toInterfaceOrientation
}
override open func didRotate(from fromInterfaceOrientation: UIInterfaceOrientation) {
guard folioReader.isReaderReady == true, let currentPage = currentPage else {
return
}
// Update pages
pagesForCurrentPage(currentPage)
currentPage.refreshPageMode()
scrollScrubber?.setSliderVal()
// After rotation fix internal page offset
var pageOffset = (currentPage.webView?.scrollView.contentSize.forDirection(withConfiguration: self.readerConfig) ?? 0) * pageOffsetRate
// Fix the offset for paged scroll
if (self.readerConfig.scrollDirection == .horizontal && self.pageWidth != 0) {
let page = round(pageOffset / self.pageWidth)
pageOffset = page * self.pageWidth
}
let pageOffsetPoint = self.readerConfig.isDirection(CGPoint(x: 0, y: pageOffset), CGPoint(x: pageOffset, y: 0), CGPoint(x: 0, y: pageOffset))
currentPage.webView?.scrollView.setContentOffset(pageOffsetPoint, animated: true)
}
override open func willAnimateRotation(to toInterfaceOrientation: UIInterfaceOrientation, duration: TimeInterval) {
guard folioReader.isReaderReady else {
return
}
self.collectionView.scrollToItem(at: IndexPath(row: self.currentPageNumber - 1, section: 0), at: UICollectionView.ScrollPosition(), animated: false)
if (self.currentPageNumber + 1) >= totalPages {
UIView.animate(withDuration: duration, animations: {
self.collectionView.setContentOffset(self.frameForPage(self.currentPageNumber).origin, animated: false)
})
}
}
// MARK: - Page
func setPageSize(_ orientation: UIInterfaceOrientation) {
guard orientation.isPortrait else {
if screenBounds.size.width > screenBounds.size.height {
self.pageWidth = screenBounds.size.width
self.pageHeight = screenBounds.size.height
} else {
self.pageWidth = screenBounds.size.height
self.pageHeight = screenBounds.size.width
}
return
}
if screenBounds.size.width < screenBounds.size.height {
self.pageWidth = screenBounds.size.width
self.pageHeight = screenBounds.size.height
} else {
self.pageWidth = screenBounds.size.height
self.pageHeight = screenBounds.size.width
}
}
func updateCurrentPage(_ page: FolioReaderPage? = nil, completion: (() -> Void)? = nil) {
if let page = page {
currentPage = page
self.previousPageNumber = page.pageNumber-1
self.currentPageNumber = page.pageNumber
} else {
let currentIndexPath = getCurrentIndexPath()
currentPage = collectionView.cellForItem(at: currentIndexPath) as? FolioReaderPage
self.previousPageNumber = currentIndexPath.row
self.currentPageNumber = currentIndexPath.row+1
}
self.nextPageNumber = (((self.currentPageNumber + 1) <= totalPages) ? (self.currentPageNumber + 1) : self.currentPageNumber)
// Set pages
guard let currentPage = currentPage else {
completion?()
return
}
scrollScrubber?.setSliderVal()
currentPage.webView?.js("getReadingTime()") { [unowned self] readingTime in
guard let readingTime = readingTime
else {
self.pageIndicatorView?.totalMinutes = 0
return
}
self.pageIndicatorView?.totalMinutes = Int(readingTime)!
}
pagesForCurrentPage(currentPage)
delegate?.pageDidAppear?(currentPage)
delegate?.pageItemChanged?(self.getCurrentPageItemNumber())
completion?()
}
func pagesForCurrentPage(_ page: FolioReaderPage?) {
guard let page = page, let webView = page.webView else { return }